How I went from Silver 5 to Gold 5
I played support only and have my team carry me :P
Haha, in all seriousness even though i played support only and really not a good player that deserves to be in Gold 5, I found some games the key to winning can come down to attitude.
I never knew how attitude could make you win or lose games till I started playing ranked.
And it starts with champ picks and bans, even though people may not listen and pick champs you don't want or not ban the right champs, do not be mad simply support your team best you can and keep any negative thoughts to your self and not type them.
If some one does something dumb or is feeding, do not discourage them, and if some one does do so, tell them its ok and to ignore the others. We all are one in the team putting 1 guy down is like putting the whole team down, so yah that may only be able to get me to gold 5 and luck may be the most part of it, but it helps more then I thought. It may increase your win rate by a small margin, but every little can help. Thought id share and maybe it will help you too.