tracking I'd charge per tracking days + per song mixing and mastering.
You just don't want to end up looking back and having made $4/hour.
Then take half the money upfront. You can always add more days if need be in the end. But if they end up breacking up during the recording or something similar you are never gonna get your money so make sure you get some just to confirm the booking.
Charge by stupid question.
I think $50 per stupid question would work out really well.
Thank you everybody! You've been more than helpful here
Quick question though.. I'm still fairly new in the field, and I like to "include mixing" with the rates..