Bot Lane
I mostly main bot, but can play all roles. But here is something I find that helps beat your opposing match-up.
Have either your ADCarry, or Support start out with sweeping lense. Camp their bushes so their forced to ward. By doing that it allows you to counter ward and keep them blind. While your ADCarry or Support is counter warding, have the other place wards down. You want more vision than them, they're going to ward the tri-bush (depending on what color team they're on) or by dragon - or both. To successfully win your lane you have to try and balance out when to appropriately push the lane. Having no vision is one of those times you don't - so in that case freeze your lane, and by doing that you let your minions do all the damage and you last hit the opposing minions. Doing so will allow your jungle to gank more, and because you've been counter warding it leaves them completely blind. You can counter ward not only with Sweeping lense, but aswell a 
Jungle should be bouncing between Mid-Lane, and Bot-Lane seeing as they're the ones putting out the most damage. Have those two positions fed, the better your likeliness of winning your game. Aswell help out your jungle if your bot lane is pushed and have the opportunity have your support ward their blue or red - while you're doing the damage.
Early game I'm not 100% focused on getting first blood, your first ambition shouldn't be to get first blood. Yes first blood is good, but get it when you know that you can secure it without being killed in the process. To do something along those lines you need to take as little damage as you can, pick a ADCarry that has long range and can poke. Poke them when they're busy trying to cs, so continue you to trade without being hit as much so that you can out-lane them forcing them back to base early game and in that time you can gain a lead in cs. Continue to freeze your lane seeing as their jungle is now going to most likely camp bot seeing that their bot is struggling against you. I usually don't go back until i have (60+) minion kills. Giving me a good chunk of gold!
A thing I find with a lot of bot-lanners is that they forget about the objectives. Yes kills are important.. and can vary the game in which direction it goes. But not getting yourself killed, cs-ing, and taking the opposing teams tower will help you a lot better then trying to rush a kill. Now in saying that like I said earlier if the kill is right in front of you and you can secure it then by all means. But If its going to get you and your support killed just so you can get one kill isn't worth it because they can be getting away with a double or one kill each and a assist.
While your lanes are pushed and your jungle is okay with it take the toad in your jungle, or golems doing so will give you a bit more of an advantage.
For supports, if you're going to go support.. don't go someone that will take the kills from your ADCarry. Yes its great you got a kill, but your ADCarry is what needs the kills. I can't stress enough seeing people going kill lane bot, it can be effective if its a pre-coordinated team. But in solo case, go something that can stun, fear, taunt, pull - etc.
As well something for support, remember your ADCarry is the aggressor not you... If you run and try to 2v1 while your ADCarry is freezing his lane and is low on mana or health you'll get yourself killed. (Unless of course you're tanky enough to push or pull into your tower). All you want to do is poke with your adc, just by doing that it'll help out-zone your opponents. Like I said the more successful pokes you do with out receiving just as much or more damage the better chances you'll win your lane. Reason to that? common sense, the less gold they have the less of a chance they'll win their lane.
Trust me, kills will come to you. Just be patient, cause the less patient you are and the more aggressive you are the more you slip up.
If you're new to support, the best way to build is like a off shore tank, chunky, lots of mana, lots of health. The longer you can stay in the battle without dying the better. (so build items that will give you both health/ability power or mana & ability power.. Continuously ward, the more vision the better.. reason why I say that is cause I see people get over confident because they have more towers and objectives/kills. Without vision a game can go from winning to losing real fast. Why? you ask, well because even if your opponent has less kills than you and they have vision through-out their jungle and yours they can start taking you guys one by one.
I may not be the greatest ADCarry out their but I know that this helps me win my lanes, and helps win the game for my team. But it's hard when your support or vice versa isn't able to lane properly by coordinating and benefiting from each others skills.
I'm not the greatest at making guides, but I hope for share of people out there this helps somewhat. Specially for those who want to climb the ranked ladder.
Wish you all the best of luck fellow summoners, if you guys would like to play a few matches add me up ! if you have things to add, be my guest im open to learning more from different peoples perspective !