PixelCover Bonus

First find your eBook cover image. If you have no suitable photographs you've taken (or can take) yourself, there are plenty of royalty-free photography sites. If you'd rather have artwork, find an image you like on one of the artists' central sales sites (eg saatchi-gallery) and ask the artist's permission to use their work in return for a credit on the inside page. They may well be delighted to get the extra (free) publicity for their work. You don't need a high quality resolution: low quality, low pixel-count images work better on the web. A cut and paste image from their website (once you've got written permission) will work fine.