1. Drink water! Being dehydrated makes your brain shrink and can lead to driving mistakes like lane drifting and late braking
2. Have healthy, non-perishable snacks on hand like walnuts, almonds, apples and whole grain crackers
3. Just say no to smoking
4. Incorporate a bit of exercise into your day. Can be as easy as having a jump rope with you and doing some jumps at a stop, maybe take laps around your truck, or have some free weights with you. Below is an exercise video by a trucker for truckers
Thank you gpstrackit.com and thehealthytrucker.net for these tips!