[t0mas88]

Constant running 10 hours a day 7 days a week for 1.5 to two years until we had the first real product launch and enough market traction to hire a bigger team. Then shifted back to 5 days + some reading etc on Sunday morning.

Now (1.5 year later) busy with international roll out (we're in Europe) so working a few 12 hour days + flying when abroad, then taking regular "no phone, no email, just girlfriend" weekends to relax and make up for not seeing her for a few days a week.

The reality is that hours don't mean that much if you get energy from your work instead of spending energy on it like I would when I was working in a "normal" job. But even then I feel it is important to keep time for sports and enough focused "offline" time with your boy/girlfriend or kids. Otherwise it becomes unhealthy over the long term even though you feel a lot of accomplishment / enthusiasm.