The main thing is that you must keep yourself and your ad carry alive. For Taric the best partners are Sivir, Ezreal, and Corki. At lvl 1, put on your stun, because it is possible that the enemy team will counterjungle, so a CC is not bad. Buy as much wards as you can. Help the AP carry too, bring him as much wards as you can. Some say, that the one who purchases Oracle first win. If you see that the enemy support is warding hardly, than don't be afraid to buy an oracle, so you can deward the whole map. If you are a little squishy, a vision ward is also enough. Try to stay in bush, and watch the map and ping if you see the jungler, so everyone can stay alive. Lategame you shouldn't use your W becouse extra armor is good for everyone, just ult in teamfight, so everyone will get a buff, and it will be easier to win it.