Tripod's right. Low and slow is the way to go. You want to smoke but not dry out the meat. Ideal temp is between 165 and 175. It will fluxuate some but that is your target zone. Before I start I put sand in the fire box. Put a double layer of heavy duty foil down first, add about an inch or so of sand, and fold the rest of the foil over the sand to make a seal. Then put your charcoal on top of that. It helps maintain the even temperature you want, especially with windy conditions. Of course, you'll want to place the smoker in a location with some protection from gusting winds, just as you would a BBQ grill.
As far as problems, I've never had any. I have smoked everything from trout to tuna, and sausages to a small pig. I even did a goat for a neighbor once. Well, he said it was a goat. It kinda' looked like a dressed out doberman pincer. I mean, he was Korean, after all! /ubbthreads/images/graemlins/laugh.gif /ubbthreads/images/graemlins/laugh.gif /ubbthreads/images/graemlins/laugh.gif