It is my suggestion that don’t rely on your memory or iphone to record and capitalize on good ideas. Go old school with a stack of 3×5 index cards. Carry them with you and, when you hear a good idea, write it down.
Trust me, the physicality of the cards forces you to reflect on them at the end of the day, and the act of writing down the idea helps you remember and process them. Having the blank cards in your pocket is also useful reminder to be looking for new ideas and, most importantly, to listen.
Enough for today!