What's your motivation to skate?
Is it to get in a calorie blasting workout? To increase your cardiovascular endurance? Is it an excuse to get outside on a beautiful day? Or maybe your favorite alternative to biking or running?
Even if you're not a serious skater or you enjoy skating for purely recreational purposes, goals like "skate 5 miles once a week," for example, will help you track your fitness levels and gauge progress.
If you're interested in trying an inline marathon for the first time, or want to join a group skating session, jot those down somewhere. How will you meet those goals?
Writing your goals in a fitness journal can give you a sense of accomplishment (or not) as you look back over the season to see how much you've done, and help keep you motivated and engaged.