Choose an audience
An image suitable for a private conversation may be unsuitable for a public page. Consider the people pictured and the setting before sharing. Obtain appropriate permission when the use calls for it.
Write a precise caption
Separate what the photograph shows from information you know through another source. Avoid a caption that makes the image appear to prove more than it can. Context should clarify rather than manufacture a story.
Build a coherent sequence
Select images with a clear relationship and remove repetitions. A small, thoughtful set is easier to understand than a stream whose only connection is the time it was posted.