One single tip for solo q success.
It's your fault. It doesn't matter what just happened. It's your fault.
Hear me out doubters.
Support is hitting creeps and pushing lane when you don't have vision or wards to put up? It's your fault. Doesn't matter if you're the adc or the top laner. You didn't tell the support to let the adc control the tempo and aggressiveness of the lane by controlling the minion wave, and to let the support control the positioning of the opponents in lane with harass while providing ample vision control.
Bot lane overextends and dies to a gank? It's your fault for not warding, not pinging them danger, not being there for the counter gank.
Jungler gets invaded at second buff by enemy kha or lee? It's your fault for not warding it at 1:50 or 1:55.
Top lane gets dove under tower for an easy kill? It's your fault for not being there to support him against the dive.
Some one gets picked after lane phase in your own jungle? It's your fault for not warding properly and buying a pink on first back and replacements for it when destroyed, and for not even considering the option of stealth wards cuz "I have muh trinket!" (And let's be honest NO ONE should have a yellow trinket post lane phase)
4v4 fight at dragon when your top laner is pushed hard and has teleport while enemy top laner has ignite? Your fault for not communicating the need for back up.
Game degenerates into an aram style "everyone group and team fight mid non stop for the next 20 minutes"? Your fault for not stressing the need to apply pressure in every lane and warding properly to allow for intelligent strategic rotations.
Team loses fight at baron when the situation isn't right to try to take it? Your fault for letting them start it instead of informing them of the situation.
Team wins a team fight trade 4 to 1 but stalls and doesn't take a tower? Your fault for not getting the team organized to take an objective, be it dragon, baron, or a tower.
Teammate raging at another team member? Your fault for not accepting the blame for the situation regardless of what events occurred or whether you actually had any physical impact on the circumstances. You have the ability to communicate, do so properly.
Troll picks in champ select? Your fault for not accomadating other players or dodging outright.
You guys starting to get the picture yet? It's YOUR fault 100% of the time. Start playing with this attitude, accept all the blame, pass around all the credit, and rack up the wins by realizing one simple truth.
It's your fault. Don't let the reason you lose be because you allowed any one else to accept even a portion of the blame. If you are that good, if you deserve to rank up, you'll be everyone's eyes, ears, brains, and heart. YOU either will them to victory, for which you will give them all the credit, or you fail, for which you must accept all the accountability. It doesn't matter if that lux missed all her skill shots in that team fight and you're not but the lowly top lane shyvanna. It's your fault for even letting the team pick that fight.
Moral of the story: if you want to win, everything, everything is your fault. Play with this attitude and eliminate 90% of the problems holding you back. Promise.
. Assume no one else is going to save you, and that you will be the one to carry your team. This doesn't mean just getting pentas every teamfight, but also being a leader and calling for objectives, putting wards down and encouraging others to do so, and knowing what lanes to push and when.