I usually book a daytime punt several days in advance.
The night before I often have a bath, shaving my balls and surrounds with standard razor. If I do get the odd little nick from the blade they usually heal up overnight, or give me a chance to cancel with plenty of notice. I also trim and file my nails while in the bath.
Before bed I floss, brush and use mouthwash. Occasionally using face wash and moisturiser if my skin is looking a bit rough.
The morning of the punt I do my normal everyday routine of a shit, a shower, shave my face, floss brush and mouthwash, style my hair, deodorant and a nice aftershave. Applying the smellies make little difference to the WG as they get washed off in the shower on arrival at her place.
All of this is just standard regular grooming to keep me looking and feeling at my best. If I time the bath and ball shave for immediately before a session with a WG, it's to ensure I'm feeling at my most confident when I am about to have guaranteed naked fun times with a hot woman. To be honest I only started shaving the nuts after a very good WG recommended it. It does lead to a few days of itchy balls afterwards, especially in the current heat, but it's well worth the effort and I am glad she offered the advice.