1. Take your livejournal username and replace each letter with the corresponding number (a=1, b=2, etc.). If your name contains numbers, break them up into 2-digit numbers and a 1-digit number, if necessary.
2. Add all of the numbers together.
3. Find the post of this number in your livejournal. If you don't have that many posts, add the digits together. Keep doing so until the number is smaller than your pathetic number of posts.
4. Take first digit of the number from step 2, and count that many words into the post.
5. Use the resulting word in a google image search, and select a picture from the first page