going short

I've had the same hairstyle for about 6 years now and have been itching for a change for a long time. Now that wedding season is over, I'm thinking about doing something different with my hair. I've wanted to cut it shorter  but am fairly terrified! I'm pretty attached to my hair so making a decision like this is a big one. I've been pinning inspiration pictures like crazy and am thinking about a collarbone length. Have you ever done something drastic to your hair? Should I just go for it?!