Everything that needs reserving, in priority order. Checkboxes save on this device — so your checks and hers live separately, worth a quick sync-up now and then.
The two remaining stays — most time-sensitive items on the board.
The reserved-slot stuff. August sells out — the top three matter most.
High-speed trains are dynamically priced — early booking = cheaper + reserved seats. Regionals are fixed-price; buy those day-of in the app.