What I do is take methylphenidate HCl. Unsuccessfully tried what I now know are called cognitive-behavioural strategies, self-talk etc. (by myself, I received no outside help whatsoever) when I was in full time education and they barely scratched at the beast, just made it worse in fact because they increased the anxiety I associated with starting any task requiring deliberately directed attention and planning.
I think I'd be in a very different situation now if I'd had access to the stuff sooner. It makes it feel imperative, and much less daunting, to be doing one of the things I know are important right now, not just some vague time in the equally vague 'future', in fact if I have nothing important to do while it's active in my brain I feel miserable and get easily distressed and obsessed about things, so I only take it once a day at the moment, before I intend to get things done.
It isn't a good solution for everyone though, as most things aren't. If your procrastination is the only symptom of AD/HD you have then it's probably not got the same cause and shouldn't get the same treatment.