I think the best answer though is probably the one you don't want to hear--option #1 (quitting and doing the startup only) is going to be best. Read Paul's comments about the need for focus and determination. If a startup isn't 100% focused on success then it probably won't get it.
You could try your option of going back as a contractor or doing part time work. Part time consulting though is tough. Keep that in mind. If you're on a tough project and you're only supposed to do a few hours here and there one of two things will typically happen: 1) you'll get sucked into more work, 2) they'll find somebody else that can give 40+ hours a week.
I've got the same issue now so we're in the same boat.
I think the best answer though is probably the one you don't want to hear--option #1 (quitting and doing the startup only) is going to be best. Read Paul's comments about the need for focus and determination. If a startup isn't 100% focused on success then it probably won't get it.
You could try your option of going back as a contractor or doing part time work. Part time consulting though is tough. Keep that in mind. If you're on a tough project and you're only supposed to do a few hours here and there one of two things will typically happen: 1) you'll get sucked into more work, 2) they'll find somebody else that can give 40+ hours a week.
I've got the same issue now so we're in the same boat.