I usually make some commemorative stickers for our annual Gathering event. This is the 9th annual Gathering, so it's the perfect time to make circle badges. I didn't get too wild on this one, but everyone here is really digging the design:

Things I am happy I learned:
1. Using circles to gauge spacing in wireframe mode.
2. Converting the lines to shapes, no more scaling headaches.
3. Rotate tool!
For the curious, I used Founders Grotesk X-condensed Medium font. The logo has been with us since 1969.
Hope I have time to try out some more creative designs before I need to get these printed.
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This one is with the "A" from our logo mark as the center for a 1-color version:

Might do one incorporating a guitar or bass peghead - need to incorporate the center design more.