Another reminder of a basic composition tip: negative space.

Negative space means space that is devoid of information. Empty, or perhaps with a subject or pattern or texture that is “all the same”. Your subject stands out against that space:

Your subject’s essence, isolation, even loneliness can be emphasized by this. Using Negative Space also, of course, allows you to get a nice off-centre composition.

Try to use this technique sometimes: you do not always need to fill the frame, and where isolation is called for, negative space can be just the recipe you need.