Use the power of landing pages wisely
No, I am not crazy. Generally, I advise one-page layouts, but when you are promoting a specific campaign or want to focus on a strong trait of your product, nail at landing pages.
That mixes nicely with strategies like PPC or referral campaign.
For example, when we are setting up campaigns with Viral Loops, our all-in-one referral marketing tool, we always set up a landing page, which always works in favor of our conversions.