How do you deal with deadlines and getting tasks completed?

Another jelly who is pretty awesome suggested asking a question like this as I am not the greatest with deadlines.

Perhaps you deal with deadlines in a way that would help me deal with them if I started doing the same things as you do to meet them. You might even help someone else who has the same problem as I do.

The question is pretty self-explanatory, but if you need more details, feel free to ask. Thank you in advance!