First, use a main profile pic that looks like a person, not someone or something hiding in the shadows.
Get on the forums and join the conversation, post your comments and opinions, and start your own threads.
Write something on your profile page to let guys know who you are and what you like.
If your profile page description tells guys that you're fun, and funny, and interesting, you're bound to get attention.
Answer some of these questions.
Are you a student ? What are you studying ?
Do you work ? At what ?
What makes you laugh ?
What do you like to do for fun ?
Are you quiet, fun, funny, talented, romantic, athletic, ambitious ?
Do you garden, run, lift weights, do crossword puzzles, write, create music, dance ?
What makes you, you ?
Why are you here ?