Decide to pocrastinate later after you did all the things.

No really, if there is something to do, do it immediately. You store tasks in the later and you only exist in the now, so later is never now. There is only now and you need to decide to procrastinate later.

Don't justify why you can't do it now. "I should wait until..." Naw, unless it is impossible to do because you need to shave the yak, do it now. No, it won't be better to do it at 4:00, 4:15, 4:30 or whatever nice increment of time. Do the shit at 3:53.

You decide when to do something, procrastination is deciding not to do something. Make the very real conscious decision to do the thing now. It isn't easy, you will have to catch yourself slipping, and you will have to learn the habit.