Many of my leads have a 'best time to reach you' area filled in and will often tell me exactly when I should call... I try to stick to that the first couple attempts. That said, I typically don't do much calling from noon-5pm, and I limit my evening calling for retired folks to before 7:30pm, while there are many younger working people who want to be called (or at least can be reached) after 8:00pm. (I have agents in my office who are ok with calling right up until 9pm, but personally I don't like calling anyone after 8-8:30pm.)