Once the sinus membranes get damaged, or wounded, by infection, they are more prone to re-infection.
The perfect solution would be to avoid that very first infection. This, of course, keeps the sinus membranes whole, healthy and more resistant to infection.
As long as there is damage to membranes of either the sinus cavities or nasal passages, there is a higher chance of infection. That first infection, if not caught in time, can really turn into a vicious cycle of repeated infections, IMHO.
Best of luck getting back to 100%!