Sometimes for parents, it's been "spend 30 more hours with my children this month" - so they work on spending an extra hour per day with their kids.
For writers, it's been "write 12,000 words this month."
For online coaches, it's been "write, shoot and edit 4 new modules for a video course."
Or for people who just want to get healthier and feel better, it's been "Lose 15 lbs this month."
So it completely depends on you. But we have a nifty little PDF that walks you through the process and gives you some more good examples.