What tips do you offer to a cyber-slacker wishing to get back to productive work all the time?
Have deadlines, even if they're artificial, and don't overplan your day.
Procrastination often happens when you're doing something you don't like (which a work-sprint can help you get through by working very fast to finish the task quickly), or when you're overwhelmed (by having too much to do). Of course, chronic procrastination is often just a habit, which can be broken.
I've been following the 4 hour workday process for the last month or so and found an increase in both my productivity and quality of life (as I'm now willing to do non-work during downtimes). I recommend it:
http://thinksimplenow.com/productivity/the-4-hour-workday/