I couldn't seem to find a thread for the OT with tips (there is one for the A4).
It's definitely worth starting one. Especially for people new to the OT.
I will start it out with a cool little newbie tip.
Do you wish you could see how a sample is being affected by a change to a parameter?
Change Trig Mode to Slices [Function] + [UP] or [DOWN].
You can use this mode even if you haven't sliced your sample. What this will do is change the display to show 4 rows 16 slices per row (4 pages/16 trigs)...but the cool part is the bottom that shows the sample playing in real time.
Now if you set a retrig, for example, you will see it in realtime on the sample line (and on the slices if you are using slices). Try changing some LFO parameters and watch how the different wave forms, multipliers, speed, and depth affect the sample playback.
-breakbeat/slice thread, has some good info on creating slices
-merlin's pdf, good read for newbies covering some general concepts