Not just with pizza but with any meal from any restaurant... focus on a few and expand! Work with some of the regulars and build your business from there. I like the idea! :D
And how about becoming a surfing, snowboarding, or skateboarding instructor? I haven't looked into it but I've heard ski instructors make good money. Golf instructors do too.
Keep in mind in the beginning things won't be happening super fast but you can build on your business.
How about instructional videos on how to do one of those things you love. A newsletter, a podcast, then start writing content for those topics. What you know about them. This all takes time and at first it can seem more like a hobby but eventually you'll be there. :)
Things going slow is part of my problem. For example my dry cleaning and gutter business. I get a ton of business one week the next week I make nothing. Delierving for other restaurants is an great idea. I just need to figure out an plan.
Last year i looked into a skateboarding camp for kids. Liability was a concern. It worried me so much that I decided not to do it.
I also like the instructional video idea. Do the work once and get paid over and over.
The question is how long should it take? How long do I go not making money?
Some businesses take years to show a profit. With any kind of business you have to think long term. Being in business for yourself involves personal sacrifice now and hopefully you'll reap the rewards down the road. There are no guarantees but one....your in charge of your own destiny.