Group nearby items into morning/afternoon/evening blocks, sequence them to form a natural geographic flow (e.g., west→east), and mark time-sensitive slots.
Try the famous pastéis de nata and a coffee at Pastéis de Belém; it opens early and is a classic Lisbon start—great to beat later crowds. Check current opening hours (typically 08:00–23:00).
Stroll the Tagus riverside and view monuments from outside while waiting for museum openings; outdoor and free, good for photos and casual exploration.
Sample multiple cuisines and local specialties at the Time Out Market food hall—open late (often 10:00–02:00 depending on vendor), good for groups with varied tastes.