The first email is so very important because, although you have already made a first-impression during your original meeting, you will be creating a new first-impression in a new realm of the relationship via the email you are about to write.  In other words, you have already succeeded in overcoming the stranger-stranger gap and are now creating a new impression for the friend-friend relationship.  This first email will weigh heavily on your crush's decision if this new friend-friend relationship will work or not.

So what should you do?  Try to keep your first email short and straightforward, friendly and informal, vague and respond-able.  Try to be succinct.  Tell how great it was meeting him/her.  Give him/her a compliment.  End the email by asking him/her to do something with you (like coffee) and give him/her your schedule for your next week.  Finally, ask what time works best for him/her.  Remember that you’ve already been approved by this person so do not try to impress him/her or inflate yourself.

An example email could look like this….
 

Charity!

I had a great time meeting you last night.  You are very interesting in a mysterious way!  Let's get some coffee and chat sometime.  My days next week are all pretty flexible.  On weekdays I prefer mornings around 8:30-9.  What works for you?

Hope you're exceptionally excellent!

Tyler

Some words of caution: never write or send the email on an impulse or whim.  Acting on impulses and whims tend to send wrong messages because they are most often narrow in scope; they are small cogs in a bigger picture.  If you send an email that later you start regretting, you may naturally have the urge to send additional follow-up emails to try to remedy the error.  Do not send additional emails before you receive a response.  You’ve had your one chance and any additional emails will lead to further anxiety and self-consciousness, thus lowering your odds of getting a favorable response.

To avoid the problem of erroneous emails, simply write a first draft and then save it for your unbiased reevaluation later.  Place it on hold for several hours and then come back to it for final editing.  Your will find that your email will have naturally molded itself into something of greater power, deeper meaning, and of more honesty than what it was originally.  He/she will take notice.

Great, so you’ve written a balanced, well-rounded, light-hearted email, but when should you send it?  Sooner than later is always better.  These types of emails are best sent one or two days after the original meeting (on weekdays) or on the first business day of the next week (if the original meeting was on a Friday or weekend).  Send these types of emails at the time of day when it’s most convenient for you, when you would normally send your business related emails.  By sending the email during this time, you are saying that the email is just another part of your life - that it’s not a big deal. 

 Once the email has been sent, relax, let go of any expectations you may have, and remember that there are plenty of men/women out there so regardless of what happens, you’re all good!