[loki01]

Something that really helped me out is "YABOT" (custom map) where you get to grind out openings.
There's no real sense in mass laddering if you don't have an opening in mind or any attack timings planned.
Another map that I like'd to play is "Macro or die" to help out with my poor macro.

Once you get the build order and macro down you should get out of silver pretty fast.

Also I wouldn't worry about getting demoted down a league , I think you should change your mindset from trying to win to trying to improve. Just bench mark your previous game to your current one eg. if you stopped SCV production in the previous game but this time didn't miss a single SCV , you've already improved regardless of the outcome of the game.