Physically: nothing drastic. 3 days out of the 1000s remaining is nothing. I might accommodate the diminished appetite by reducing portions slightly or a leisurely walk/bikeride.
Mentally: I strongly advise against the "crime and punishment" head trip. IMO any sort of recovery/atonement mechanism only makes us more vulnerable to future misbehavior. Better to live with our choices 100% of the time.
Lots of: urban hiking, cycling, sprinting
Lots of: fresh meat, seafood, eggs, organs, tubers, starch fruits, vegetables, meat fat, dairy fat, oil fruits
Some: cured meat, dairy protein, sweet fruits, rice, pulses, tree nuts, oil seeds
Minimal: soy, refined proteins, sugar, liquid carbohydrate, grains, refined oils, peanuts