Always carry a camera, it's tough to shoot a picture without one.
The problem suggests the solution.
You have to learn not only from your failures. You must also learn from your successes.
There is no bad light. There is spectacular light and difficult light. It's up to you to use the light you have.
Always shoot it now. It won't be the same when you go back.
The drama of light exists not only in what is in the light, but also in what is left dark. If the light is everywhere, the drama is gone.