How to get out of silver?

The main thing you should focus is try to cs properly, don't int and try not to greed for kills.

Dont tilt stay focused and dont worry about teammates

Spam easy champions so you can focus on macro instead of mechanics. All the faker wannabes that are stuck in bronze because they try to do mlg montages aren't climbing precisely because of this

Play jungler like ammumu with a good amount of hard CC. A lot of low elo players cant handel it and will easly get cc'ed and you may win the teamfight.

I'd like to know that myself friend, I'm stuck in silver like forever!

be creative and smart enough to not fall into common mistakes (rush for kills instead of objectives), suicide under turrets, give free turrets and so on.
that's the point, improve yourself, understand the game, and you're set.

Recreate your account and master at least two champions, AND at least familiarize yourself with at least one champion from each role (adc/top/supp/jungler/mid)

You have to play one or two champions, change your vision of the game and you will become a diamond

pick a champion and stick with it , practice a lot or play a lot of easy champs haha

i don't know either, i'm still sucking bronze five haha