Did a brisket this last weekend...only my second one ever. I think I was on the right track until I let it sit too long. Everything I've read is it's generally between 12-15 hours for a 15ish lbs brisket, so I started it at midnight. It was done by about 2pm, so within the range. I pulled it and let it sit until around 5pm. It was a simple rub of salt, pepper and celery seed. When I went to cut it, the outer layer was pretty tough and chewy, but the inside was pretty decent. I want thoughts on that. Then, I also want thoughts on what you guys do with left over brisket...We have a pound or two and I'm trying to figure out how to reheat it. I'm thinking of making a gravy and making some mashed taters with brussel sprouts (one of my kids' favorites oddly enough). Any other suggestions for brisket leftovers?