I LOVE my Silhouette Cameo. And no, I'm not being paid to blog this. I seriously just love it.
My Cameo also came with some sketch pens. But I think they're less than stellar. They don't always write smoothly and I'm not a huge fan of the metallic choices. But I did realize that pretty much any pen would work, if the machine would just hold it. (The sketch pens are chubby!). So after brainstorming, I realized a small strip of electrical tape would make a regular fine point Sharpie or Sharpie pen, chubby enough. After successfully addressing over 50 Christmas cards, I took a quick iPhone video tutorial.
The video: It's not fancy, I'm pretty sure you can hear my dogs and kids in the background but I think it could really help others who are looking for a personalized yet quick way to address envelopes. The result is more thought out than just feeding an envelope through the printer. You can tell it was done with a pen/marker but people aren't going to know how your handwriting looks so neat!