Doing The Most vs. Doing Too Much

Lately I've been wondering if I've been doing too much to try to make it. IMO, there is absolutely a difference between "doing the most" and "doing too much."

For me, this is doing the most:

Working hard, or "grinding" as so many people claim to do. While I haven't quite stepped into the role of entrepreneur (yet) I realize that to get where I want to be, I have to do things that I don't necessarily want to do now. So I endure a job I don't like, persevere through a career I love that is at a stand still due to the economy, and daily come up with new ideas of how I can turn my real passions (writing and the arts) into viable means of income.

But I'm afraid I may have fallen into doing too much:

I wonder if this is me. Focus has always been hard for me and it's no different now. I know the end result that I want, but getting there is proving to be more difficult than I envisioned. So I try to take on more and more to make up for what isn't happening that I think should be happening. So far, this has lead to being super stressed, constantly tired, and getting a bunch of nothing done.

Does that mean I'm not built for the kind of dreams to which I aspire? Or am I just doing too much for the moment and need to pace myself? At this point, the answer eludes me. I've slowed down on some things: put chartering a NBMBAA chapter on hold, kinda dropped some of my sorority obligations (which I feel terrible about, but there's not enough Tori to go around), cut out the tiny bit of social life that I had. And although I don't have a choice with the job and career, I am weighing my options on the other ideas to figure out which is the best for me presently.

I'd hate to get burned out from doing too much before I get to show the world what I can really do.