The best advice anyone can give you is whatever you do, just do it faster.
Also if you want to leave the silver ranks, play without nades. You won't die as many times due to messing around with flashes and such.
Fast peek is a good one also you could even fire hoping to catch the enemy doing the same. Shuffling out and aiming is too slow especially if you dont get a hs very soon.
If you cant peek fast enough, jump behind a box to see if anyone is there. Might sound or even be a silly move but if really playing higher ranks it gives a good chance not to die right away. A typical example, CT on the mirage B site looking apartments; you can call early
The kqly jumping shot actually works without cheats, some can do scout but m41as works, possibly
Nades dont throw in close proximity. You can nade down banana from the B site, you can nade car from the truck. Even if you mess up and flash yourself you have time to recover, indirect is good to learn. I would not put off knowing smokes, flashes are easy to go wrong.
I need to use flash better, drop flash, walk forward - simples?