Paperless billing is such a nuisance. I get too much email and I'm far too busy, so anything in the email queue is quickly forgotten. I don't have the time or energy to be re-reviewing emails every day for bills that might be coming due soon.

I try to get all bills on paper. Then I just write the due date on the envelope when it arrives and keep them sorted by due date in a neat pile on my desk. Impossible to miss a due date that way.