If you use computers, I know that you have run into software that totally sucks. In fact, not only did it totally suck, but every piece of software that came close to doing that thing sucks. Or you have run into wanting to do something that simply no software out there does.
There are still LOADS of gaps like this anywhere from tiny utility software up to enterprise level stuff. Pick one. Whatever one bugs you the most. Write some really good software. Open source it and sell support. Or don't.. whatever. Just write good software.
So you need some deadlines to keep you going? Not uncommon. Have someone do it for you (isn't that what you would do by contracting?). Either get yourself a partner (preferably someone who is keen on handling all the _other_ parts of creating and running a company in exchange for the possible rewards) who is also a good deadline-setter and will not let you slack. Or hire yourself a business coach if you do want to try your hand at the other aspects of running a company and just want someone to egg you on.
Read Paul Graham's essays for encouragement and why starting your own software company is (still) a good idea.
http://www.paulgraham.com/Oh yeah - ALSO find yourself another engaging hobby or two. They must involve at least the following:
Social interaction. Yes you need this. You cannot work in front of a computer at work and do programming all day and then come home and do it all night.
Your boss made that rule for a _reason_ . In order for your creative programming side to flow the rest of your mind must be fed. If you just program all day every day for primary job and then your side job your productivity will drop like a rock. This should ideally involve more than one person - a significant other will severely cut into the time you can spend on the stuff you need (socializing with more than 1 person and getting outdoors (see below)). It is a trade off.
Get out. Out of the house. Out of buildings. Gardening maybe. Or hiking. Bicycling. Whatever appeals really. This is important for all the same reasons that social interaction is. It will tend to give your mind a break from thinking too heavily and the opportunity for creative thoughts to bubble up. It will also keep your body healthier. Not Olympic gymnast healthier. Heck - gardening will leave you a fat slob (if you are, and want to remain so), but it will bring your health up a slight notch nevertheless. If you want to be time-efficient, find a hobby that combines social activity plus getting out - this would possibly allow the space to date. But I do feel that doing something relatively mindless (BUT NOT IN FRONT OF A SCREEN - no video games and no TV. They are not mindless enough) is also fairly important even if it is only for a short amount of time..but regularly. At least once per week. Heck - just sit outside in a lawn chair in the sun and make chain mail. No thought involved, but you get fresh air and sun.
Remember, the hobby must be engaging enough that you will continue to do it in spite of the pull to spend all of your time in front of the computer. Try out a few and see which one sticks with you for a while. Plop a reminder in your calendar a few months down the line to start the programming part (ie: don't get so sucked into the hobby that it cuts off your original plans). Plop a reminder in your calendar a few months down the line to re-examine your hobby(ies).
Yes, this will severely cut back on the total amount of time that you spend in front of the computer programming. In fact, you might get only a tiny bit of code done per week (best done in extended-concentration burst I know - maybe one weeknight and 6-8 straight hours on one weekend day). But it will be much higher quality and you will get a LOT more done during that time.
If you are concerned about the time issues and you happen to watch TV cut it out. Watching TV fulfills neither of the requirements for a healthy body and mind needed for programming. If you must watch TV, get yourself a TIVO and use it to ensure that you only watch the good stuff and you don't just plop down in front of the TV to "watch what's on." And also make some rules about the TIVO for yourself ie: once a recorded program reaches its time limit let it expire off. For every new program you add to your favorites, you will take one off. Etc.
If you like video games - figure out some way to cut back. Maybe an old-fashioned timer - set it in the next room for 30-60 minutes. When it goes off you quit your game and then go into the next room and shut it off. And then you do something that doesn't involve sitting down.
