Dice-setting in my opinion is crap. I think sector betting a roulette wheel has more merit. There are several things you can do to maximize the chances of hitting your sector.
1. Know the physics equations
2. Presolve them for a given rpm
3. Sector bet 7-10 spots after the wheel has been spun and if the rpm is close
4. Never use a roulette wheel that spins at constant velocity
5. Only sector bet when the manually spun wheel is slowed down such that the croupier will give it another spin on one of the next turns