A few of the dangers of working alone that Paul mentions:
- Drying up creatively
- Losing confidence
- Becoming over confident
- Reaching the limit of your knowledge
- Having a blinkered perspective (tunnel vision)
- Feeling overwhelmed
You can read the full post for some recommendations on where to find a community, friend or mentor, but if you're reading this post, I believe you're already on the right track. Everyone can benefit from an outside perspective, and the community at Concept Feedback is a great place to share your ideas, help out a fellow designer and expand your network.
I've been learning this lesson on my own lately. While I have the option to work from my home, I've come to find that being in an office and interacting with people gives me a greater sense of motivation, satisfaction and productivity. Maybe you've had an experience on your own, or advice for the rest of us. If so, please share in the comments!