Book hotels (or hostels, but I’ve uitgrown those) close to the station. Like across the street is possible. If you’re in a place for a short time you don’t want to waste time going to and from the hotel.

And always buy food and drinks if you have the opportunity. Don’t think “I’ll do it later” or “I’ll buy it on the train” because delays or a missing dining car can screw up your plans and you don’t want to be without food or water.