Make a copy of your pattern - write your colors on that copy -- then make all the other copies you need so they are all marked with the proper colors. Makes it easier so you don't get confused as to what goes where.
Cut your pieces out BIGGER than you think you'll need them, especially when doing corners or angles.
Some suggested getting your paper damp to remove it -- I found it to be much harder to remove if it was damp...I like it better dry.
Do go past the edge of your sewing line...makes life easier as pointed out.
If you make templates, put all the pieces back into a baggie and paperclip/staple it to your master pattern so you have it on hand the next time.
Take a picture of each of the possible arrangements if you have sections to piece together (like 4 pieces to make a square) so you can see which way you like the colors better...you don't have to always do it like they show you in the directions.