Having Problem falling to sleep

Working long hours a day, tired, thinking when I get to bed I'll fall asleep easy.  But no! That's not the case.  Once I'm in bed, I'll be wide awake, my body's tired but my brain still wants to work. I'll be tossing and turning for hours. I'm not getting enough sleep and I don't like it.
My friend told me to do some breathing exercises,  do relaxation technique,  and meditation. I'll try!