[mattiesmat]

I am/have been in your also and I might be able to give you some advice.
I am a winning player at the 3.4's and I am currently moving up to the $6.5's.
When I start playing I first start an empty word document (and some music), then I start PokerTracker and PokerAce-HUD and then finally I start my tables.
When I play and I am unsure of what the correct play is/was I save the hand history in the document.
When it is a ICM/bubble decision, I also take a print screen (with alt+print screen) of the table and I also paste it in the document below the hand history, this way I have my opponents stats and I can set their ranges (later) accurate.

After playing I go through all my saved problem hands myself and give them a quick review.
The hands that I am still unsure about I post on the forum or at least let a good player review it.
Then I insert all saved ICM trouble hands in SNG-wizard and I check whether to push/call/fold, using my screenshots to set ranges.

After all this I am ready to play more games and repeat this process and of course I keep checking my posted hands on the forum.

This is quite a lot of work, but it is well worth it if you want to improve, it has helped me a lot.
I 4-6 table and a set takes about ~50 minutes and all the work after takes about 15.

Hope this helps!