You have to make the commitment. For some people, keeping track of mileage, and or time, of rides helps to keep the motivation. Having to write it on a calendar,post on spreadsheet, or whatever storage you use, is a mental reminder of what you are trying to do. Seeing those posts and the improvement in actual performance is a self satisfaction builder and a measurement of what you have accomplished so far. Seeing the improvement helps to imagine where you can go. For some people, riding with others is a big factor in sticking with it.