Let me give you some tips to save your ideas for future reference and action.
- Send an email to yourself about the idea-Gmail is a good storage place
- Talk into a voice recorder-buy a good one that is easy to carry and use
- Talk to your spouse about your idea
- Send a short text message to yourself about the idea
- Carry a small idea note book and jot it down there
These are just a few tips. The best way for you is the way you will be most comfortable with.
At least have three alternative approaches to make sure you don't lose an idea