Burnt ends are great! Pork burnt ends are even better in my opinion.
Basic pork butt benefits the most from a dry brine of salt (1/2 tsp kosher per pound) the night before, followed up with a sweet rub with no salt right before you put it in the smoker. Low and slow is the key, so I'd recommend a temp of 250. If you are doing something like 8-10 lbs, expect a long smoke for an internal temp of 200.
For the burnt ends, it's easy enough to take your butt and cut into 1" cubes, season and throw on the smoker for about 3-4 hours. Then mix up your sauce/spice/sugar mix, cover the burnt ends in it, and place in pans generally 1-2 layer deep. Put back in smoker ~2 hrs, stir every 30 mins, and when the internal temp is around 200, your done!
Easy stuff. It starts getting more complicated if you want to spritz, or wrap, change the temp profile (250 for 3 hours for the butt then 350 to finish it off), injections, etc...