Creativity can’t be contrived. The best ideas come at unexpected moments. Ideas are fleeting, so set up the systems to capture the inspiration when it appears. Get a good note taking app that memorializes ideas so you can dwell and build on them after the moment passes.
The native note taking app on the iphone, Apple Notes, is my app of choice. It’s quick, simple and easy to share the individual notes with friends if I want to collaborate or get feedback (sharing ideas is a great way to keep me accountable and solicit feedback).