Adding to Jessica's comment. It's good to spend some time looking at your helmet. If your head is warm enough or cool enough it make the ride so much easier.

Does it fit on your head properly? Also set your helmet up for riding conditions/seasons. i.e., if it's freezing block the vents and use a helmet liner. Fast down hill conditions or ice? Downhill helmet....For colder weather you may need a helmet with more coverage, summer, a lighter helmet.

If possible, add reflective stickers or blinkies.