I was someone who didn't know about this site, or what I was even saving for, but I just knew I didn't want money to be an issue as it was for so many people in my life (parents, grandparents, friends, etc.). I still enjoyed my 20s while being frugal. For me, that was mostly traveling. I also once walked away from a job and took the entire summer off before looking for new work. During that summer I completed a few projects, enjoyed some lazy time, and whatever else I felt I was missing out on by being at work.
However, during all this I had no concept of the notion of FIRE. Once I stumbled across this site, I was not unhappy to hear about years I'd wasted. Rather, I was happy to hear I wasn't alone and that I was as close as I was. While I now share some of your feelings about wishing FIRE would be here tomorrow, it'll get here eventually. In the meantime, enjoy life. Whatever stimulates you, indulge now.
For example, I purchased a home a few years ago, just to fix it up and rent it. I enjoyed going there after work, remodeling, painting, or whatever was the task that night. I enjoyed it so much, I ended up buying a second property and doing it all over.
My point isn't to rent properties, but rather find something that keeps you motivated. That item may earn you some extra money and get you closer to FIRE, or it might just be something that you really enjoy. Just because you haven't hit FIRE, doesn't mean you can't enjoy life!