For Switzerland, for someone who likes railways, I found this guide (missing from guide.travel) to be quite nice: https://www.seat61.com/train-travel-in-switzerland.htm

While planning the trip, I was annoyed by redditors on r/askswitzerland ending almost all replies by asking folks to download the SBB Mobile app. To my surprise, even though I'm not the kind to install apps (let alone Flutter apps), it was god-sent. So well made (their "design system" is open source: https://github.com/SchweizerischeBundesbahnen/design_system_...). Makes travel up and down the country, from Zürich to Lugano, from Genève to St. Gallen, from Basel to Campocologno, stress-free.

For tourists, TooGoodToGo.com (mystery meals) & SwissTopo (trails) are equally neat.