If I could offer up some advice for online dating...
I think the biggest one would be
Don't ignore/disregard a potential connection just because they have no profile pic
Long story short, had been messaging a girl who had no profile pic, and when I say messaging, I mean like, once a week. It got to the stage where I had basically lost interest.
One day she asks if I wanted to meet for a drink. I say yes and agree to meet her, thinking it would be a flop or I would be completely unattracted.... Well, I had an amazing evening, she was funny, attractive and we had a great time together. I gotta admit I was apprehensive about meeting up, but I thought, why not? if she's not what I'm after, use it as experience, talk, chat and have a bit of fun try different lines of conversations etc.
Take a gamble on a profile with no pic, make sure the profile looks good and send her a message.
Don't get stuck messaging back and forth
I used to do this. Getting into long deep meaningful convo's is great if you want to spend your nights writing essays back and forth between somebody you just met online. Some women, I've found, will be happy to do this all day and all night... somebody there to listen to their problems and how their manager at work gave them a hard time today.
My advice would be to avoid getting into this situation... Get the hello's out of the way, back and forth with a few pleasantries, what you do, what your likes/dislikes are, where you hang out etc... If you are getting a good vibe, don't hang around, ask her out. Why spend 2 weeks messaging when you could just be talking to her in person.
I see more and more on womens profiles as well like 'I don't want a pen pal', and 'if you just want to talk, look elsewhere'... I found that sometimes a connection will go cold, convo drops off, less frequent messages. I look back at those and say, 'I should have asked her out... maybe she was waiting for that'
As soon as the opportunity arises for me now, I'm asking girls out for drinks. mid week mingles are great for breaking up a dull week at work.
those are the 2 biggest ones, some other advice
look outside your 'preferred' age range
keep your profile short and to the point, and update it often
pics with smiles, friends and locations
don't get hung up on one connection, and drop others that have potential
when messaging, display value in yourself and confidence
It's been a learning experience for me, dating has changed a bit in the last 5 years and I'm still learning a lot of lessons... practice makes perfect though.
I'm sure this stuff has been covered before, just my 2 cents.