Being Watched is a -5 for me. I have an office to myself (and at home, a home to myself), and that's how I prefer it. Company is an unpleasant distraction. However, something that does work for me is:

Collaboration +8

Working with at least one other person on a project does wonders for getting me to get things done. When it's just me on my own working on something with no short-term interaction with anyone else, I find it a lot more difficult to maintain momentum.