1. When inspiration strikes, go for it then and there. If you're in a situation where you can drop everything and tap it, then by all means do it. Whatever you make with that moment of inspiration will be stronger than anything you'll make without it.
2. When you create happy accidents that can't be used for what you're doing but look cool anyways, take note of them. Write them down, take a picture, whatever so you can re-use them later. These come incredibly handy.