Make sure you clean thoroughly during each change.
Make sure to wash thoroughly when you bathe.
Stay hydrated. It may sound counter intuitive, but if you are dehydrated your urine becomes more concentrated and more likely to cause problems. Also smellier.
Most importantly remember that people are too involved with themselves to notice what kind of underwear you have on.
Lastly, with adult diapers you get what you pay for. Cheap is just that, cheap. You'll get a bad fit, leaks, falling off, all sorts of problems. That doesn't mean you need the most expensive diapers, but you certainly don't want the cheapest.