Although DT's interface is incredibly user friendly and the blogs and message boards are full of information, some things are not always obvious to the newbies. Here are some of the things I've picked along the way and wish I'd known before. They work for me, but you might get a different experience of course:

The keyword "girl" is broadly used and often depicts pretty sexy girls. When uploading a little girl's picture, I discovered that using the word "child" rather than girl in the title will give better search results, especially if sorted by relevancy, and sales. The word girl should be there of course, but I think it's better to insert it in the key words and the photo description than in the title. FYI the search "girl" brings nearly 1m images, versus 320,000 images for the search "child".

Titles are extremely important, as they seem to be the number one factor when sorting by relevancy. Titles should be brief, descriptive and precise. I initially called this photo "Feeling Light" and I still like this title as it fits well the picture. However, I soon discovered that the automatic translator thought this title meant photographic light rather than a weightless experience. I had the weirdest translations in French, Italian and German. I renamed my photo Pregnant Woman Swimming which I find much more boring than Feeling Light; however, my image earnings report indicates that the buyers looked for the word pregnant when buying my picture and the translations are more accurate, giving my picture more chances to be found.

Finally one thing I learnt today regarding the blogs (thanks Petar). Although there is no Save Draft command as such on the blog page, if you press Preview Article after having inserted at least one image and 5 tags, your blog will be saved but will not be published until you actually press the Publish Article Command.