“The goal you set must be challenging. At the same time, it should be realistic and attainable, not impossible to reach. It should be challenging enough to make you stretch, but not so far that you break.”—Rick Hansen
When you set goals, make them S.M.A.R.T.: Specific, Measurable, Achievable, Realistic, Time-Constrained. You can do that with most anything, and writing is no exception.
A page a day = A novel in a year
Now. Go. Write.