1. Space: Don’t cram things in to the image.
  2. Color: Use color to make items stick out or draw someone’s eye.
  3. Fonts: Stick to Sans Serif fonts to play it safe.
  4. Text: Don’t use more than 4 words in an image.
  5. Stock image: Edit them to work for the thumbnail & avoid cheesy images.
  6. Position: Choose where you position yourself between the left, the right or the center.
  7. Sizing: Make sure the items in your image are not too big or too small. Ask yourself “if I have to make something really small, should it even be in the image”.
  8. Arrows: Use arrows to direct people’s eyes to the thing you want them to notice.