I end up having to play support 99% of the time.
The champions that are my most used are:
and
For me, it is just a very easy job to stand behind everyone and to give everyone barriers.
What is the strategy for which champion I should use in a battle?
Which ADCs work well with each champion?
ok long subject, As supports can tailor their play styles to a lot of lanes ill give you a general overview
1) Janna is the best peeling support, you will want to pick her either with low mobility adc's that are vunerable to diving like 
(if the other team has hard divers like 
for example) Or bc of the extra ad on her E (her shield) you can also match her up with fast tower pushers 
, or one last one burst adc's who can almost 2v1 the lane like 
or 
2) I actually don't play this one much but I would not pair this up with any thing but other poke lanes as you don't offer much to your adc other than a small shield so I would go 
But again this is not one I play often so it could work with others well. Karma is mostly team oriented and peel for the back line with the slow on Q and the Teather to root. And the AOE speed boost which you can get from 
really makes it a fast Team speed boost pair it with a 
and what you have is very hard engage
3) Lulu is a peeling support with a fairly unique skill set, A single target speed boost, a shield, and an ultimate that gives health and a knock up are all really good for an adc who is going to be closer to the front lines(low range ), and is at high risk to get dove on 
, how ever you will most commonly see lulu picked with a as he is immobile and basicly a moving turret, pick lulu when your adc needs to carry hard in the late game so that you can keep them alive long enough to win you the fight.
4) Lux In theory can be a support, a ranged stun, a ranged slow, a shield. But lets be honest if their adc has half a brain then your abilities are telegraphed and you don't do much damage as a support in the early game. However if you do want to do it I would suggest poke/ long ranged adc's who just need to be peeled for like these adc's can 2v1 the lane and get ok farm with their range and abilities you just need to keep the other support away from them. But as I don't Play lux really at all ive really got nothing else
5) Sona how ever ive played quite a bit, She is the ultimate poke support, so I would pick her with other poke oriented adc's as you will just be trying to bully out your opponents while sustaining through their damage. Sona's trade off however is that she has the lowest base health in the game so you'll have to be a tad bit careful against things like 
as these guys can lock you down the the enemy adc you were poking down is now getting free gold. Take sona if your have these poke champs and the rest of your team needs some form of engage as sona's 
Cresendo (R) is one of the more powerful engage options in the game.
Hoped this kinda helped, im not the best player ever but this is what ive learned in a nutshell, add me and we can play some XD GL on the Rift
Someone asking for Lulu advice? I'M HERE!!!!! (WARNING LONG POST)
1. Who works best with her? Anyone who are autoattack reliant. Even better if they can be at the frontlines. Good examples are 
(yes Quinn/Lulu lane is very nasty). Of course, backline and longer-range ADCs such as are just as great. She still works with caster ADCs, though, so there's actually no one that she can't work with.
2. What should you do in lane? Compared to most supports, Lulu isn't easy if you want to stay alive, do something, and not drain yourself too quickly in lane. Don't forget her range is a LOT shorter than those compared to other ranged supports, unless you have heals (in which she doesn't). Optimally, you should be standing side-by-side, poking and timing your pokes/shields properly. Since you like shields, I'll just focus primarily on that. Contrary to popular belief, it is far better to E ally cast than enemy cast in general, because E ally cast actually gives someone not only a (weak) shield, but also an AA-steroid that deals magic damage! Which also means, yes, your ADC can help break Morgy shields, even though you should use Q to break it completely before anyone uses any CC spells. Use W sparingly since it has a long cooldown. Try to AA more instead of Q to harass, so you can sustain longer in lane. Since Lulu's supposed to be THE backline buff/debuff support, don't fret too much if you are a little behind the ADC position-wise. Just make sure your ADC doesn't get into deep trouble.
3. What should you do in teamfights? This is pretty much thinking, decision-making, and "use your own judgment". Yeah, sorry, this isn't Lulu mid/top where you blindly mash buttons and be useful; that's not how support works. Since you're Lulu and that you're squishy in general, you should try to stay in the backlines and peel for squishies. In general:
4. Any awesome items to build?
: If the stats alone don't make you smile enough, then the passive is just as great. It makes the purpose of E ally cast even more meaningful.
: You hate healers or shit like Swain? Your midlaner is AD? This book is affordable to even supports, and you'll definitely look smarter once you build it. Hey, it's got great stats too!
or 
:
Spellthief if you can spend at least 50% of your time harassing. Otherwise, go coin. Use your own judgment, but in general in a Caitlyn lane, go coin. Switching items would only lose income output, so it's not necessary.Otherwise your typical support items are good enough.
Since I one-trick main Lulu, I don't have much clear info for anyone else. But in general:
: E = free BF sword + very strong shielding power. As Janna, you can literally stay in the backlines forever and just peel from squishies. She's THE disengage support, so don't fret if you can't land fancy combos.
: A more magelike version of Lulu, but without disables in the place of having lockdowns. Since she got so much raw damage and range, mash Q for the maximum (annoying) harass potential. Use W if someone gets TOO close, or you want to lock someone down. E is for general shielding. In lane, use more R+Q for the nastiest harass potential. In teamfights, try to use R+W for super strong lockdown, or R+E for free Sivir ult + shields for all.
: If you want to look like a midlaner crying about the fact that you can't get mid. Nah, don't shoot me, I'm just kidding.
She doesn't have much utility on her, and drains mana faster than Lulu does. Which means, her harass potential is limited. If you wanna be THE carry support, that's your go. Even though Lux botlane is NOT recommended, unless in Bronze or some shit.
: Like Lux, she doesn't have much utility, but more raw damage/heals instead. As Sona, you're supposed to poke as much as you can (Q passive hurts like a bitch I tell ya), and help sustain you and your ally in lane. Uh... there's not much to her if you wanna be a decent one, but to be a great one, you gotta know how to use your passive (like how Karma uses her ult), land great stuns without dying, and fiddle with your auras for maximum effect. Q aura = bonus magic damage upon next hit for allies, W aura = mini shield, and E aura = more movement speed.
Hope all this helps.
Full guide (by me) here: http://www.lolking.net/guides/316127
