Having comfortable gear helps me the most when riding 700 plus miles a day. I have comfortable riding pants and jacket that are waterproof so no need to switch to rain gear. I wear wool socks and water resistant boots. A comfortable modular helmet so no need to take it off when refueling. Non cotton athletic boxer briefs help prevent monkey a$$. I stop for gas usually @ 220 miles and drink a regular size bottle of water at each stop (keep several in my trunk). If I don't have to take a leak at the next stop I drink 2. I make a PB&J sandwich the night before and eat it around lunch time on a gas stop. The stops are what kill you for making distance. Plan them out so you can minimize them. Nothing like stopping for gas then having to stop to pee 60 miles later. then stopping again another 60 miles to eat. Minimize your stops and you can go 700 miles in under 12 hrs. on the right highways.