I recently took on a design project for a friend who hired me for a project. I charged a nominal 10% of my usual rate (because they refused to let me do it for free) but I am working at 110% my usual level because I love them and they deserve my best work and I owe it to them (and myself) to give it my best shot.
I don’t know if you know this but it’s actually very cool to be very good at what you do, both professionally and recreationally. Do your best every time.