The first thing you need to do is celebrate because you've worked extremely hard for all of this and its good to treat yourself to something. 

After you get done celebrating though there's still work to do. 

Lesson #15: Document your work on display

It's important to have visual proof of your work on display.  It helps when you're telling somebody about you show if you can show them actual pictures of your work on display.  It validates you and then you can use the pictures on your own website when you tell other people how to have their own shows.  Plus, once the work comes down, good luck trying to get the gallery to let you show the same exact thing again. 

Yeah, not happening.

You've still got time to market your work.  Make appointments with people who couldn't come to the show to personally walk them through the pace and answer any questions they might have about the work.  Not only is it a nice thing to do, but always keep in mind that anyone, I repeat - anyone, is a potential investor.  You never know you may want to buy your work in the future, so always be on your toes. 

Plus, make sure that the space is being presented and maintained how you want it to be presented.  Are the lights working, or is one bulb burned out?  I had to replace two bulbs over the course of my show, so be cognizant of it.  Is the space clean or did some kid spill a Coke all over the floor, so now the floor is all sticky?    

Lesson #16: Have contact information by your work at all times

Finally, your work is on display even when you aren't there.  So, make sure to both leave a comment book (if possible) so people can write comments about your work and leave business cards or gallery flyers - something to put them in contact with you if necessary.