Both my boys are neutered and both are great (except for Kaedyn about the agressiveness..but I'm pretty sure neutering didn't cause it as he was neglected in the past).

After Kai came home from his surgury, we just made sure he wouldn't pick at the stitches and would take it easy. The taking it easy thing wasn't too hard because he was still groggy. It'd be ideal if you took a few days off but it isn't totally necessary. You could always crate your dog and put on a cone while you're out.