How to get out of silver?

Try to find a nice duo mate.
Play less champs like 2-3 and get as good as possible on them.
And of course a main lane. Don't play everything.
Always ping. And if you don't tilt, do not go for a /mute all.
Because even if they listen only 1 out of 10 times to your pings,
that 1 time will help you.

Having fun is the most important part.
If you had some bad games and you are in a bad mood, just stop for that moment.