Originally Posted by Kalarepa
Basically, new TT works like this:
Pick Teemo/Darius/Singed/Olaf/Amumu/Volibear/Jax or lose to Teemo/Darius/Singed/Olaf/Amumu/Volibear/Jax.
As much as that sounds like a joke, it's not a bad starting point. You can also use Kayle as a blind counter-pick to Darius (let's face it, he'll be on the other team). I haven't seen much Voli myself. I'd also recommend giving Nunu and Cho a chance at the AP-tanky role.
If you don't play a jungler, make sure someone is semi-regularly clearing your camps anyway, just to get a little extra cs and keep pressure on the altars. At about level 3, you should be able to have one of your duo lane help out your solo lane, clear camps, and buy.
Any time someone on the other team goes down, see if you can press your advantage. The death timers become OP; one good teamfight later in the game can mean multiple towers for the victor.