First, always use a black text (Be sure it is bold) behind your title. This will make it more visible and make it look better in general. Second, choose a font that fits the theme of your thumbnail. Third, always credit yourself somewhere. Fourth, add expressions to the gims on your thumbnail. This will show how your gims feel. Fifth, always have at least one gim do something. It could be watching, wondering, running or battling if I had to mention a few. But still, whatever you do in your thumbnails is up to you.
By:MapleSyrup