Valentine's Day might be harvest time for jewelers, florists, and chocolatiers, but almost every industry can tweak its marketing strategy to take advantage of the holiday which, after Christmas, sees more spending than any other.

Consumers spent more than $20 billion on Valentine's Day last year, and much of that revenue will come from smartphones and tablets, with mobile coupons and special offers playing a significant role. To give your mobile marketing strategy some heart-shaped oomph this year, try these six ideas to help your audience get engaged in more ways than one!