Give the book a simple rule
The easiest memory books have a constraint. In I FOUND THIS, the constraint is tiny punched pieces and collecting challenges. A rule creates cohesion even when the source material is chaotic.
Mix categories, not just chronology
Instead of Monday, Tuesday, Wednesday, try color, typography, food, local words, transport, patterns and unexpected finds. The result feels more like the personality of a place than a schedule.
Save one big thing for the ending
Choose one final object, scrap or image that somehow holds the whole trip. It gives the journal an emotional ending without needing a long written summary.
Let every trip look different
Do not force a visual style while traveling. The place already provides one. The colors, tickets, labels, wrappers and typography you find will naturally make each journal different.