I'd probably just give myself a sports betting almanac. Until you asked that question I never fully appreciated Back to the Future 2.
Speaking of gambling. I'm going to Vegas for a week during March Madness. Let me know if you'll be in town for a poker tournament.
Also, it's an almanac so you could only look at the results when you needed cash.
When Marty goes into the future they should arrive in a future where he went missing (because he's traveling through time). Hence, the whole movie makes absolutely no sense at all.