The first place I would look is the rogue FAQ at the top of the page:
Linky This as well as
Elitist Jerk's rogue forum/guide, should give you a strong starting point.
Read everything in those two links as well as download the spreadsheet posted on the Elitist Jerk's site, those will all help you with finding your inner rogue.
As far as easy gear there is tons.
I would look into getting some of the Trollwoven set as well as the ice strikers cloak, both are fairly cheap BoE epics and will give you some stats to work with. Look at gear that drops from heroics and start running those. Also buy two Librarian's Paper Cutters from the AH ASAP they are very good daggers which should last you for quite some time.