Trust me. Coffee is my best friend but I do know that my body has completely undergone hormonal swings. Even my partner says that my lack of sleep and increase in coffee and Red Bull has changed me.
IMHO sleep + physical exercise can get you way further: Will make you work smarter, healthier and better thinker.
I'd say try to adjust your schedule to allow (at least) 7 hour good quality sleep[1] and at least 45-75 minutes of exercise daily.
You'll have 15:30 hours free :-)
[1] Getting a good sleep involves a good bed, freshly oxygenated room, right temperature, no room, no iphones/ipads/e-devices, no video-games, no-movies etc.
I meditate for about 30 minutes each night before sleeping and it does make up in multiples in lack of sleep. Without any scientific evidence but at least I feel more rested the next day.
7 hours of sleep with a full time job, a startup, kids and exercise? Is this even possible! One great life-hack we have is to sleep with the windows open and with thinner sheets. We both feel more refreshed the next day. And apart from the alarm clock, there are no devices :)
I'd say try to adjust your schedule to allow (at least) 7 hour good quality sleep[1] and at least 45-75 minutes of exercise daily.
You'll have 15:30 hours free :-)
[1] Getting a good sleep involves a good bed, freshly oxygenated room, right temperature, no room, no iphones/ipads/e-devices, no video-games, no-movies etc.