Procrastination is one of the worst bad habits we have. All bad habits are self-sabotaging in one way or another but when you put things off that need to be done, you set into motion the possibility that they won't get done on time or at all, or they will get done poorly with errors that could have been avoided had you tackled them in a timely fashion.

And there are unintended consequences of procrastination insofar as procrastination can cause people to think less of you and perhaps not want to work with you on future projects. You never know. So it's best to be as impeccable as you can in all of your transactions.