I too wanted to wish you good luck on your laparoscopy and best wishes for a speedy recovery!
I had a lap last year for a cyst (found Stage 4 Endo as well!), and for me it was a great experience!
Take your iPod or music to play (relaxing songs of course!) if they will let you before going in for the lap. It will take your mind off it some and may help with anxiety. Just a suggestion
As far as advice...ask for anti-nausea drug with anesthesia to ward it off as a precaution. The procedure is not too long and you won't remember anything. Afterward, just relax and take it easy. It helps to take a small pillow to put against your tummy when riding home (ease the bumpy roads and seatbelt hitting site). Also a heating pad on your shoulder helps get the excess 'gas' out of your body...I never had the "typical" shoulder pain after, but many do and I heard this helps.
Anyways, I hoped I help a little and put your mind more at ease! Again, good luck and let us know how it went!