Lets Talk Splitpushing
To those of you unfamiliar with the term, let me explain:
Split pushing is the art in which 1 person separates from the team to create pressure on the opposite side of the map.
Split pushers or split pushing, for that matter, is an important strategy, and is also very effective once you realize that you have someone doing it.
Split pushers will likely not have great scores, they will have high farm, be able to 1v1 anyone who comes their way and will likely provide so much pressure on the team that they bring 3-4 people to them.
There are some champs whose role are primarily to split push. People like Udyr/Trynd/Fiora just to name a few. If you have one of these champs on your team, know that unless they are extremely far ahead and your team isn't super behind, they will NOT group. SO DO NOT ASK FOR GROUPING.
I'm sick and tired of people saying "Oh, we could've won if you just grouped with us". NO. NAE. NAI. NEIN. There's a reason these champs don't group. Their kits are terrible for teamfighting.
Now, lets talk about you people who don't understand split pushing and what you should and shouldn't be doing.
DON'TS:
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DONT JUST SIT AROUND TWITTLING YOUR FREAKING FINGERS, DO SOMETHING. If you see 2 people top lane chasing after your Udyr, GET SOMETHING. You now have what we call advantage in numbers. If you can't abuse the number advantage then you're worthless.
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DO NOT GO TO HELP. For the LOVE OF GOD. Don't go to him. He's split pushing for a reason. He's ready to die, BUT don't let his death be in vain.
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STOP WASTING TIME. Your teammate is providing you valuable time to do something, to catch up and to cap objectives. They can only dance around for so long. MAKE USE OF IT.
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Don't flame your split pusher and ask them to group, it's pointless. They won't group and they know why they won't group. When they DO group and you guys ace the team, it's because they KNOW what their doing. So you forcing people to group in unsatisfactory situations will NOT help you win. You do your job and they will do their job. When they group, you know it's time for a show down.
DO'S:
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Shove the lane furthest away from your split pusher. Split pushers normally shove side lanes, not mid lane
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Try to group as often as possible with all the other members of the team. This is actually the best time for you people to go mid and do useless shit. Except, it's not a waste of time, it's buying time
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Provide equally as much pressure with the other members of your team as your split pusher is providing for you
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Cap Objectives. Towers are open, dragons are open, barons are open
People have their own play styles. You can't control it. Accentuate your play style and adapt to your teammates.
split pushers are valuable to this game and I can't count how many games I've won because of them. Being a split pusher myself, I'd rather you not worry about my KDA and worry more along the liens of how much we actually help by providing pressure.
Edit: Be aware that this is purely for the basis of split pushing -- this is not an answer for all your problems. There are some games that can't be won, some games that are better won by grouping and some games where it's not wise to split push. Just putting this out there!
Edit2: Here's some things FOR the split pushers as Battlecast Janna and Monkey Madness stated
Here's a list of tips that I've gathered on split pushing throughout my 5 years of playing this game:
- Don't split push if you are significantly behind
- Don't split push if the enemy has a split pusher that is better or more fed than yours
- Don't split push if your enemy has an inhibitor advantage in a side lane (especially bot)
- Don't split push if your vision is being systematically denied/if you have no vision control
- Dont' split push if the enemy team has a teleport advantage (time those TPs) _
- Be cautious when split pushing if the enemy team is highly mobile/has multiple Air Drakes
- Be cautious when split pushing against a team with a stealth champ (ie twitch, eve, rengar) for obvious reasons _
- Do split push when you are contesting an objective and you want to force the enemy to either split up to contend multiple objectives simultaneously, or concede one entirely (ie send your splitpusher bot side when you start a baron dance)
- Do split push after securing a pick (it will be free towers for the split pusher and a 4v4 for the rest of the team)
- Do split push if the enemy team has a very defensive team comp that excels at breaking your siege and clearing minion waves. This combined with proper rotation will eventually allow you to break their defensive position, at which point they will be hard pressed to fight you.
These are very good points as well. Don't disregard any information you get. Vision and map awareness plays a vital role in split pushing.


If I use those near a lane that is pushed to our side of the map, DON'T FARM THE MINION WAVE. I've already done the hard part of setting up for a monster wave.
If you farm the wave I just used to set up, you're going to reverse the effect. Our wave will push in super fast then stall either at a turret or at the end of Zz'rot's range. This ends up creating a monster wave for the enemy team instead.