[lxt]

Some ideas, from one with a small child:

Lunch breaks are great for side projects, even if you have to go work in your car in the parking lot, or the cafe down the street.

Also, if your commute is via or can be via public transportation, or a car pool, you can work on that.

See if you can get up at 4.30 on weekends as well. I bet your spouse and child don't, so it's an instant extra couple of hours.

Hope that helps.