The only other thing I'd add is minimise/downsize now, before you do your own thing, i.e. sell your house if it costs a lot to live in it and buy something smaller. Watch your spending habits, stretch your dollars farther, now. Make your life as cost-effective NOW while you have a good income and start putting the savings away.

Too many times, I've seen people get so excited about their own venture, thinking they were going to carry on as before and a ways down the road they lose everything because they didn't realise you don't go from start-up to good net earnings all at once.