For the past twenty years on November first i switch my day to night to be able to do the kind of work i do thru the winter , shifts being 6 , 7 ,8 , 12 , 18 hours with every night being different and never knowing .Then being the owner of the company i some how have to be up thru the day time to anwers the phone to take care of customers requests and every thing eles that comes with being the boss .. ect . All the best answers Gerritt have all ready been posted from those of us who do what we do and you will have to use every one , what's been working best for me over the years is to make sure i get my seven to eight hours of sleep before i have to go do my shift and its a must , and as many naps as i can fit in . When you can start to feel like all your doing is sleeping then you have it down pat . Good luck .