Some tips:
Be sure your route is OVER 1,000 miles. Plug it into MS S&T or something like it before heading out. DON'T count on your ODO to be good enough. The IBA will check it using a mapping program, so should you.
Be sure you have all your paperwork in order, don't lose any receipts. Be sure your gas receipts show the REAL time and date on them. This is very important on your starting and ending gas receipts, as they start and stop the clock for your ride. Check your start/stop gas pump out the day before you do the real ride to be sure it will give you what you want so you're not riding around looking for Plan B station. If, along your ride, you end up getting a receipt that's missing something then go inside and have a clerk print you one with the info, or put the time/date on it and have him sign it. I've also had them stamp the back of a receipt with their check endorsement stamp, which shows the station number, name, etc.
I write my odo reading and fuel-stop number on each receipt. This makes it easy to build your trip log after you get home, saving you time on the road. Then when you get your map ready to send in along with your other paperwork you can just write the stop number on the map and circle it.
Don't forget you need to account for stops longer than 30 minutes. So if you stop for a 1 hour nap you must log starting and ending time for the stop and the odo reading. Ditto for a long lunch or dinner (but you won't be doing either, right?).
Don't stress yourself out about the ride. A Saddlesore can be accomplished in far less than 24 hours without much trouble, but not if you're psyched out about it. Keep your pit stops short and to-the-point. Above all keep moving. Your average MPH drops off real fast when you're chit-chatting with gawkers at a gas station.
Above all, stay safe and have fun. If you're too sleepy to continue, or conditions change and you're not comfortable with them then abort the attempt. You can always try it another time. If you're successful we'll be ready and waiting to read your ride report and welcome you to the club.