One more point. Submitting photos in the various photo contests is a great way to earn a bit of Steem and to attract followers. Here are links to 3 contests.

@photocontests, organized by @juliank
Daily color challenges, organized by @colorchallenge (Temporarily inactive)
#tepchallenge, organized by @theexplorer

For entries into those photo contests, short posts are OK. But it's a good idea to add a bit of text explaining the photo, to give the post some meat and to make it more interesting.