Villa have reached the last eight of the Champions League, have hopes of qualifying for next season's competition and are in the FA Cup semi-finals.
Emery said: "Even when they are sleeping, they have to sleep thinking football and wake up thinking football.
"Now is the moment because, really, it is our responsibility to try and be as good as possible for 90 minutes on the field.
"To get this is to rest well, good food, prepare for the match mentally and physically, and arrive as strong as possible.
"Last year, we were not really 100 percent with the players - without energy - physically and mentally. We reached the Champions League but we were struggling through the last two months.
"This year, I want something different. I want them to be 100 percent focused."
For the first time in 18 months, Emery ...