Writing down ideas
If you are a person who is riding the bus and all of a sudden a beautiful idea hits you, you need to be ready to write it down. You can use your phone or a notepad and pen to write them all down and store them for a later date.
You can even write down any idea that pops into your head regarding whatever aspect of your life. It doesn’t have to be something creative, it could be a goal that you want to achieve and so on. Keep them all in a journal or digital archive that you can look back on.