Buying a resistance band can be great to fill in the gaps between hotel gyms. Doesn’t need to be anything fancy. Something portable that you can travel with to add resistance to bodyweight exercises. Only other tip is to superset your workout, mainly for the time benefit. I travel a good bit for work and it’s amazing how I lose track of time and skip workouts due to time limitation.
Another option is rocket language. It seems to be a lot focused on developing conversational skills. It’s is paid but not subscription which I’m a fan of. You just buy the language you want. The first few lessons of a language are free if you want to try it. I’m test running it right now to start my switch away from Duolingo