I love depositions. They can be so much fun. I just posted one of my favorite deposition clips. She was the Director of Nursing at a nursing home that I sued. I won't tell you the facts, I'm sure you will be able to figure it out when you watch the clip.
Lessons? First, stay on your path. You have a line of questioning you want to follow, don't let the witness knock you off your line.
Second, don't be afraid to ask about the standard of care. If you can establish the rule from the other side, it is very powerful. More powerful than if just your experts say what the rule is.
Third, video tape all depositions. Watch her body language, it is as valuable as the testimony she gives.
I hope you enjoy the clip and learn something from it!