Put up pics of yourself doing something, or with other people. Do NOT post pics of you taking a pic of yourself in the bathroom mirror. Smile on the pics. Show some teeth. Put up as many as you can. On your profile description, be honest and tell them what you like to do in your spare time and in life. Show a little philosophy, but don't get carried away with it. Don't get too wordy. Chances are they've already made up their mind by the time they have gotten past the pics.
Do NOT always talk about yourself. Only do so when prompted. If anyone told you that dating is like going to a job interview they are lying. Ask the other party questions, but make sure they're good ones. Show a genuine interest. 'What are your goals in life?' is too broad. Ask about what they did last weekend, or lure them into talking about their friends. Take the bait when you are prompted to say something about yourself. Don't go on and on about your job.
Above all, stay positive and optimistic, and NEVER bring up exes unless you really have to.