Everyone else had great specific, but there are also general guidelines you want to follow in order to make sure you're positioned well to take advantage of these great suggestions. These general guidelines include--
Make sure your website is fast. Slow websites will destroy your conversion rates, your bounce rates and your pageviews per session. If you're running wordpress, here's a list of plugins to help make sure your website is fast and secure-- The Best Plugins Every Wordpress Site Needs
Make sure you have the proper analytics in place. There's no point in getting a great surge in traffic unless you know where it came from and how successful it was to gauge how you can replicate it. Here's a guide on how to really optimize your Google Analytics to make sure you don't miss out on any opportunities -- How to set up Google Analytics
Try to go viral. Viral traffic is the goal, as it will lead to the lowest cost per visitor and probably the highest converting as well. There's so many methods on going viral-- encouraging social sharing with ambassador and referral programs, growing an email list, making sure you have social share buttons present, etc etc. Figure out which works best for you and leverage the heck out of it.