1 vt to collect
[Holz, Ähren, Fakten, Material, Erfahrungen auch] to gather
[Blumen, Pilze etc] to pick, to gather
[Truppen, Anhänger] to gather, to assemble
neue Kräfte sammeln to build up one's energy again
seine Gedanken sammeln to collect one's thoughts
Punkte sammeln (Sport) (fig) to score points