Shoot the same set every time
Establish a standard sequence: wide shot of the property, wide shot of the work area, close-ups of the problem, close-ups of anything unusual, and a shot of access constraints like gates or landscaping.
Consistency matters more than artistry. When every job has the same set, gaps are obvious and disputes are short.
Photograph the fix, not just the failure
Before, during and after. The 'during' shots are the ones most contractors skip and the ones homeowners find most convincing, because they show the parts of the job that get covered up.
Include something for scale when the detail is small. A hand or a tape measure makes a hairline crack readable.
Use photos in the proposal
Attach the inspection photos to the estimate and reference them line by line. A homeowner who can see the rot does not argue about the deck board replacement.
This is also how you justify pricing without lowering it. Documented scope is the strongest defense of a fair number.
Build a library you can reuse
Organize by trade and job type, with permission noted for anything you plan to publish. Over time you accumulate a visual catalog of the work you actually want more of.
Those images belong on your landing pages, in your follow-up emails and in the proposals you send to homeowners who have never met you.