Hey @wisejg, thanks for taking the time to read & comment. I think you can definitely apply #1 and #3 with a smartphone. You can get some great small and cheap phone tripods that are not too much hassle to carry.
Also, look out for dedicated camera apps like ProCam, or the camera built into the Lightroom Mobile app. These allow you to have more control over the settings of the camera on your phone, so you can force it to use different shutter speeds and ISO settings to optimise the quality of your images.
Most inbuilt camera apps like the one on the iPhone assume people don't know much about how the camera works so they hide away a lot of the settings to avoid confusing people.
I've spent a little time trying to get the best images out of my iPhone 7 - maybe I'll do a quick post with some tips in it sometime.
Happy shooting :)