The certain skills you acquire need to be maintained, otherwise, they are forgotten and turn into wasted time. The skills that can be useful to other people can be monetized. If you are a good specialist and can offer your services, then you can easily find odd jobs at All you need is to go through a simple registration and fill out your profile and you can choose projects and work on them at a convenient time for you.
To see this working, head to your live site.