Business 2 Community has a great article rounding up successful seasonal campaigns that have great Valentine's Day successful. Key marketing strategies:
1. Nostalgia wins
2. Don't forget the singles on this holiday
3. A heartwarming message wins if done right
4. Changing your product, packages, etc. for the holiday works.
I love seeing specific holiday displays in stores as well. Take a look at this Pepsi display in a Wal-mart in Upstate New York. image via Derrell Smith
What other seasonal displays have you seen?