Rattle in Driver's door
 

for a few months, i've had a rattle in the door every time i close it. I'm afraid it might have something to do with the power window operation so i want to take the door panel off and check it out. I've never done this so I was wondering if there are any pitfalls i should look out for in taking the panel off. Plastic screws break, lining to protect against leakage, etc? Thanks.