When you've written a really great post, sometimes it'll be picked up by a big website that features the best blogs on the web, and by linking back to your site, you're bound to get a HUGE increase in hits.
But will you be ready to harness those hits for the long term?
If you want to make the most of your big break when it comes, you've got to be ready for it beforehand. You want to make your new visitors "sticky" by providing them with content that they'll want to come back and see over and over again.
Make sure you've optimized your Adsense ads, and always keep a nice, clean, attractive blog.
And no matter what, keep writing and improving your content, because great content is what will keep new viewers coming back "again, and again, and again," to quote the hit movie Gladiator.