Try wearing it all of the time. Then try and go without it.
I can't fathom how it can be something you only use when you feel like it, kinda defeats the point.
That's actually how I determined whether or not I should keep mine. I wore it for nearly the entire two-week trial period, and on the days that I wasn't wearing it noticed if I missed it or not. I felt that I could do without it. It wasn't really feeling like a "must have" device like my iPhone did. Ended up returning it.