1. Figure the numerical values of the letters in your username: aerden = 1 + 5 + 18 + 4 + 5 + 14
2. Add all of the numbers together: 47
3.Make a note of the first digit of this number, (4), then add the digits of the number together: 11
4. Find the post of this number in your LJ. If you don't have that many posts, add the digits together again. Keep doing so until the number is smaller than your pathetic number of posts: Here.
5. Take the digit you noted in step 3, and count that many words into the post: 4 - 'short'
6. Use the resulting word in a Google Image Search, and select a picture from the first page. Here.