What to do when you lose your motivation to workout and eat healthy?

Is it easier to sit on the couch after a long day of work instead of working out "YES"
Is it easier to go through a fast food drive thru instead of making a healthy meal at home "YES"

STOP and LOOK how you feel and what you want to be in life.
To get started you have to push pass it. 
After day 1, 2, and 3 you will start to break those bad habits.
And form new ones and the motivation will come back and it will get easier.