It's always gratifying when clients value your work. We developed this article a couple of years ago for Staples and they recently resurfaced and promoted it on Facebook because it performed so well the first time. Although we had to laugh at some of the comments on the Facebook post, which pointed out that nobody "uses" a cactus every day!
Check your analytics and look for content that performed well or ties into trending topics and breaking news. Then resurface those via social channels, promoted or not, to increase your return on marketing investment and drive more traffic.