With so much focus on your feet and body, don't neglect these other parts! A ventilated and/or brimmed hat can protect your head from the sun during the summer. A winter hat will help regulate your body temperature, since one quarter of your body heat escapes through your head. Gloves also help regulate your body temperature. And lastly, be sure to protect your skin (and eyes) from damaging rays. If you'll be outside longer than 15 minutes, you should wear sunscreen, even in the winter. Sunglasses are a good idea, too.
Following these tips should keep you outside comfortably all year long!