Ok, here's the story:

I've emailed and chatted with a girl online a few times before she agrees to meet me for a drink one night spur of the moment at a bar across the street from my place.

We meet around 10pm - we talk and laugh over drinks in a quiet relaxing environment, things are going well. I notice that she's playful, flirty, smiling and has made an effort to make physical contact, all the good signs you could hope to encounter with a girl like this. We wind up closing down the bar with out conversation and she hints at being hungry so we wander to a diner just down the block to get food. Over a late night meal surrounded by drunkards we have an even better time - she's starting to flaunt her body a bit and tells me that I resemble Alex Skarsgard (I'm a far cry from it but I'm ok with her thinking so). After dinner we head back to my building and sit by a fire pit, I really like this girl and I don't want to move to fast so I'm fairly hesitant to invite her up. We talk till 3am and I walk her to her car where we hug, and there's a rather nice kiss that lasts over 30 seconds. I feel like I've played my cards right some definite sparks.

Thirty minutes later she texts that she's home, had a nice evening and says something funny. I thank her for the wonderful evening and wish her goodnight.

Enter confusion.

So we've met on Match and I realize that this girl is both busy with a career and she's admitted that she recieved 500 emails in her first week online. She also copped to having to keep a spreadsheet to keep track of her potential suitors info. I don't make any contact the next day and wait till after work to send her a funny text.

I get no response but I know that she's been online. How should I best re-engage this girl? I don't want to overwhelm her with communication but I do feel like I'm working against the clock to score a next date. She's almost always responded to me over IM on the site, do I wait a few days and try to spark up a conversation some evening? Any tips would help.

you have to close no matter what, if you trully want the girl you have to have sex with her asap. she could be yours but not until then and girls will hinder you in having sex with them its a matter of game and intent. did you pay for the dinner thing you had?
do you have her number? best thing to do is to call her and ask her out to have some fun. remember to ask her alpha style dont actually ask her what she wants to do.

Yep - I paid for drinks and dinner. I didn't want to rush things as she'd dropped some hints that she's rushed things before and I just didn't get the impression that she was a first date hookup kind of girl.

I do have her number - but do people actually call these days? If she doesn't answer do I leave a message or just try cold calling?

well dont pay attention to what she says its irrelevant, if you're a man of great value she wont have to wait n see shit etc listen if your game is tight enough women will cancel their plans for you, pay for you, put up with your shit all day long. you need to approach women at bars all the time, cultivate proper mindset if you want success with women in any type of relationship.

call her if you cant see her face to face, dont leave a message, she knows you want another date, if she doesnt return your call she doesnt care. would you ignore a girl you like? you can focus on this one girl and keep calling her begging her for a date but you know where that road leads.

i suggest you call her only once, if she picks up, make it short and to the point TELLING her your gonna go have a few drinks and that she should join you...if she doesnt pick up i suggest you approach tons of women find yourself yet another beautiful girl.

Ok - so I waited a day and called her, left a message saying I was hiking this weekend and wondered if she was game. This afternoon she called, I was at work so I didn't answer, she left a message asking to call her back - I waited a few hours after work and called, left no message.

advice?

calling back and forth is getting a bit awkward at this point but she returned your call, its a good sign, you should message her on the website, chat for a bit figure out logistics and invite her out