Best way to do waivers? (on Yahoo)

Commish question here. I’ve been a commissioner for several years now and have always seemed to struggle with the waiver system. Of course, we do FAAB. But,
a) how many days should players be on waivers?
b) should the waiver rule be game time-Tuesday or Continuous
c) lastly, which specific days should I have the waivers process on

Does anyone know what the footballers preferred method is on these questions?