Cycling is a fun hobby for me, therefore I set high but flexible goals. For example; I set the goal of 500 miles per month, but work schedule, family time committments, etc... sometimes ( most of the time) interfere with achieving this goal, so I remain flexible in my persuit of the goal. So when the end of the month rolls around and I'm still approaching my usual 350 miles, I'm not too dissapointed.