Just don't shit the bed, stay off Twitter, don't play golf every other damn day, don't engage in needless hyperbole. If he has to lie, and he will, it's part of the job, at least make your lies somewhat credible and don't embarrass us when dealing with our allies and our foes.
Hire people who have a clue and not because they gave you money. (Although every President does that, just make sure that their expertise is somewhat related to the job you're hiring them for!) Unlike hiring a neurosurgeon to run the federal housing agency!
All I ask of Biden is: DON'T DO ANYTHING STUPID!!!! Just act like you've been there before. Be boring, plain, simple. Just do the damn job with as little fanfare and chaos as possible. Be the anti-Trump. Just settle for competent.
That's all I want.