KanjiJLPT N2
Pick / Adopt

pick, take, fetch, take up

Mnemonic

You thrust your hand into a heap of gathered dice, rolling each between your fingers. You pick / adopt only the ones showing sixes — these chosen dice will guarantee your victory tonight.
Additional thoughts
Imagine the tactile sensation of your fingers sifting through a mound of dice, deliberately selecting the perfect ones. Hand + Gather/Dice = Pick/Adopt.
Quick recall
Your hand sifts through gathered dice to pick / adopt only the luckiest ones.

Details

The keyword for 採 is pick / adopt. This kanji conveys the act of selecting or gathering something by hand, much like picking fruit or flowers from a plant. By extension, it also means to adopt or take up an idea, method, or proposal, as in choosing to accept something from among various options. The underlying sense is one of actively reaching out and making a deliberate selection.
On'yomi
さい
Kun'yomi
と.る