Use SMART goals. Straightforward in theory, but for some goals this can be quite difficult to do. E.g.
Write 10 tests vs learn and apply 10 new testing concepts.
Better yet, use SMARTPIPE goals.
I learnt and applied 10 or more new testing concepts, giving me a more comprehensive skillset for testing applications.
Never set a goal that a dead person can do better that you. For example, instead of “stop drinking Coke”, I could have a goal like “replace drinking Coke with drinking water/tea/etc.”.