When a good idea pops into your mind, hold on to it! Explore it and see what you can do with it. Write it down! Keep a pen and notebook (or PDA, iPhone) with you at all times, for these random ideas.
Keep a notebook by your bed or use the “Voice Memos” app on your iPhone. Some of the best ideas I’ve had appeared in my mind while I was falling asleep. It’s how I’ve figured out solutions to problems, what to write in an essay and even what to say and how to express myself at a job interview.
If your idea is entrepreneurial in nature, take the time to expand on your idea to see if it improves or somehow becomes something you can develop further. Talk to people. You never know when a seemingly absurd idea changes someone’s life! You may even turn it into an entrepreneurial venture and make some money working on an idea you created and absolutely love!