Wheelbuilding rules of thumb for us fat guys:

1. "More spokes is better spokes" (36 is a good choice)
2. More crosses are better than fewer
3. TIE THE SPOKES at the outermost cross from the hub
4. Use all the tension your rim and hub will stand (this distributes the load between more spokes and minimizes rim deformation)
5. Use the deepest "V" rim you can find.
6. Use heavy spokes (double butted is OK, but don't go light)
7. Use brass nipples
8. Use brass washers at the spoke head to minimize play and SET THE HEADS and washers with a hammer and punch.
9. If possible, get offset drilling for the rear rim to equalize spoke tension between sides as much as possible
10. Treat the wheels with respect - keep the tire pressure up and avoid beating the wheels on curbs, potholes, and rocks if possible.