So here's some of what I do-
I'll get up a few hours before the ride so that my system will "wake-up" and evacuate itself. Once that's taken care of, I'll take an Immodium or two to slow things down because quite frankly, the last thing I want to do is to take a deuce in some of these gas stations. Many times I'll shower and shave before heading out.
When it comes to eating while on the road. I find it really doesn't matter just as long as you don't overdo it, either on quantity or on sugary things. I bring turkey and cheese sandwiches, several pre-peeled oranges, Pringles, Famous Amos cookies, and 3-4 bottles of Powerade (unless it's hot, then I'll bring two and buy more as I need). While I am gassing up, I can quickly eat a sandwich, along with an orange and some Pringles and drink some Powerade. The point is to rehydrate and to get some food in your belly so that a grumbling stomach doesn't become a distraction. You don't need to eat a lot- just enough to last to the next stop.
At each stop, I'll take off my helmet and jacket and walk around a bit. I'll use the restroom and wash my face and hands and run water through my hair to untangle it. I plan for 20-25 minutes per stop; there's no need to rush it (on a SS1K; other rides may vary), and the ability to walk around a bit and wash-up will make you feel like a new man. Unless you're a woman, then I can't say what you would feel like.