Starting my first brisket tonight as well. There is a great walkthrough written by bigabyte noted on an earlier brisket thread with answers to alot of questions I had including whether to leave the fat cap on (the answer was yes). Good luck on yours!
WSM 22 ~ WSM 18 ~ Maverick ET-732 ~ Flaming Fast Thermapen ~ Weber SS Performer ~ Weber 22 OTS ~ Weber 22 OTS ~ Weber 22 OTPlus ~ Weber 22 OTS ~ Weber Q300
When all else fails just ask yourself, WWGALD???