Practice awareness in your surroundings by taking a few minutes to notice one new thing. This is a great thing to do on your journey to your workplace each day. If you can't find a new thing, try altering your route. This gets us out of "remote control" mode and engaged in our trip (and maybe out of an accident).
A physical practice of awareness is to practice your balance by losing it. Sounds crazy, but it's simple:
Stand with your feet side by side and touching. SLOWLY lean forward until you lose your balance and take a step. While your leaning forward, really concentrate on that moment when your are losing balance--when can you tell? Can you pull back into balance?
This practice comes from t'ai chi the grand ultimate in balanced movement.