Smoking a Brisket this weekend have some questions!!!!

[enzo]

I'm going to be smoking a brisket this weekend and had a couple questions about it. 

1. My temp gauge on my smoker has been known to be off, so what would y'all recommend for a thermometer to attach for a more consistent temp?

2. I'm going to be soaking some cherry-wood chips in vinegar has anybody ever done this and what was your results?

3. Any good rub's out there that someone concocted? I'm looking for something new..

Thanks for y'alls time