Best time to wake up?

5 am - my favorite time. But unrealistic with how late I stay up most nights :(

This is totally up to you! I like to get started around 8-9am. But I do know some highly successful owners who don't start working until 1pm and later!

whenever you feel fresher and your body gives signal

You need to have had enough sleep to start the day, so it's best to sleep at least 7 hours.