What you seem to be missing here is having an idea of what would be a better picture. "Better/worse" is a strongly personal scale, so it cries for having your personal opinion mixed in.

To solve that,

• look at photos of the same genre/subject that others have made. Searching by keyword on Google or Flickr should bring enough study material. If you like any of the photos, analyze why you like those. Think how you could obtain similar results yourself, ask here if needed. If you see any total blunders, analyze those too, so you won't make the same mistakes. Steal like an artist.

• experiment - try different angles, lighting, surroundings, props. It's all part of finding your own personal style. Again, see what kind of results you like, and tweak those techniques further. At the very least, always try taking more than just one picture of the same subject, compare and analyze. Practice like a champion.

• think about what you want the viewer to see in those images, and how you could stress those traits. What should interest the viewer, how can you make it more catchy? Here's a hint: everything in the photo is making it either better, or worse. There should be no stuff "just being there" - that's called distracting. Cater like a servant.