rule # 1, win your lane.
rule # 2 ping effectively
rule #3 move on from a loss and try to learn from it, watch videos of you playing in spectator mode so you can see what others are doing and try to understand why theyre doing it.
rule 4# play a lot, im talking 10 ranked games+ per week
rule #5 get good on a handful of champs and main them until you feel you've been accuratley placed in your MMR, then go out and learn more champs.
rule #6 dont get angry at your team, ever, it helps no one and your team mates are more liable to ignore you, do the opposite, troll, or leave.
rule #7 watch your minimap just as much as you do your lane, its super valuble to see whos face is missing on screen and to know when that happened.
rule #8 its just a game, have fun.