Basically in Bronze and silver you need to pick a carry, try not to be support however choose it if no-one else will or if you are told to, better than fighting. Carries i would recommend include
-Kayle (Jungle,Mid,Top)
-Nunu (Jungle,top,mid) i just countered yorick top, WTF
-Ahri (mid) what a fucked up hero
-Fizz (Jungle, mid)
-Twitch (Jungle)
try not to play lee sin jungle in low elo, i know we see amazing plays with him, but trust me if you low elo....... its gonna ruin your judgment, since all the players will either mess up your combo because they are bad, or because you are bad.
Another final tip, aim your skill shots away from your enemy, scrubs will walk into your Nidalee spears like children.
Even the smallest donations help keep sc2sea running! All donations go towards helping our site run including our monthly server hosting fees and sc2sea sponsored community tournaments we host. Find out more here.