The main precaution I'm taking is hand-washing, especially when I come into the house from outside. I have done it as a practice for years, but I'm more vigilant now. I'm trying very hard not to touch my face when I'm out and before I have had a chance to wash my hands. I'm not sure I'm doing so well there.
The other thing is doing the best you can to be as healthy as you can, so that you are as resilient as you can be. Eating properly, a diverse diet, being physically active, getting enough sleep, that kind of thing. And staying in touch with people, keeping your spirits up.