I only have one rule about darkroom work: To have fun!
Other than that, I never go in with the intention of making more than one or two good prints. If I'm really feeling it and get more good prints out of a session, then that's a great bonus, but I try to avoid putting more pressure on myself than one or two good prints, because that does take the fun out of it and it becomes a chore.
That's how it is for me. Try to have fun, and avoid putting pressure on myself. I feel like we have so little time as adults, with so many demands put on us by our surrounding. The precious time away from those demands I gather should be fun.
Hope that helps.