Looking for tips on being more consistent..

So, i was looking through my op.gg... and i noticed i am a really in-consistent player. Sometimes i do super good, sometimes i do super bad. but i'm never really in the middle.

I understand being more consistent in my game-play will surely help me climb the ranks and was curious if anybody had any tips on improving on such a thing?. An example would be my csing, i know trying to get X cs by X time in every game will help on a csing standpoint to being more consistent. But what about other aspects of the game?

I was thinking i should make note papers and stick them beside my screen to constantly remind me i should look to being doing certain things like warding and looking at the mini-map. What do you guys think? Does that sound like a good idea?