It's a super tough thing. I think the startup founder with a successful marriage and a successful startup is the rare exception. They're both full-time commitments and one almost always loses the battle for attention.

Tom Leykis (much hated LA "shock jock") advises (paraphrasing): Do not get married until you've achieved your dream in life.

I think that's good advice to take, even if it's tough thing to face. I haven't see much evidence to contradict it.