If you're talking about "months in a row" touring, maybe things haven't changed too much from when I used to spend most of the year on the road.....
- #1 - Be in the best physical shape you can be. Sleep and nutrition are for people who work in offices. Much of your self-promo is done AFTER your show at radio station wing-dings and at the hotels. IME, your body is going to be seriously sleep-deprived and food-starved.
- #2 - Be as kind and generous to everyone wherever you play. The "gift" is not letting them hear you, the "gift" is giving you a place to play. If you get a radio station interview or newspaper interview in some jerk, back-water, town, treat them as if they were LA or London. The more "bridges" you create, the less you have to cross.
No one invites a band of pricks back. Guns n' Roses can hardly get a gig at a YMCA these days or with an experienced promoter.
- #3 - If you have an irreplaceable piece of gear, don't take it on the road. Just take a piece with a backup that you know you can count on and won't be a disaster if it gets stolen. That's one reason why you see so many touring bassists using a common Fender who have their bass treasures back at home.
- #4 - If you, personally, didn't put it in the pipe or in your drink, don't touch it. There are lots of losers out there who get a thrill out of messing you up.
- #5 - Booking agents can (not "will") be a good thing. Check them out well ahead of time for thier track records. The good ones can eliminate a lot of bad surprises....."oh, we thought you brought you own stage lighting" and even help if a van/truck with the gear breaks down.
Basically, just use all of your street-smarts and have the time of your life!!!