Recently I've fallen in love with Hero Arts. This is a company that "gets it" in terms of social media, blogging, Twitter, etc. Better than that, they have great stamps! I love all the designs, and their social media savvy makes it easy for me to fall deeper in love with ideas and inspiration. I even won a Twitter contest and got a free stamp from them!
They do a weekly challenge, and I'm going to try to participate each week. Here was my first challenge: Create a monochromatic card:

I used the HA CL291 for both the large and small circles, and a HA stamp for the three flowers.