im not an affiliate but I highly reccomend this site, has helped me alot
www.uncoverpoker.com the guys that are in the instructional vids explain their moves in online games and are wicked good at their game.
For specifically cash game advice I suggest you pick up a texas calculatem and run it along side your games and read up on dan harringtons book as well as....(and I very highly reccomend this author)... Roy Rounders book. Just do a search online for any of these and you will find them.
Cheers,
-RB