Hart was dropped by City boss Manuel Pellegrini in the early stages of last season after a number of high profile errors – but the impressive 27-year-old fought his way back into the side and back to top form.
That was a wake-up call for the England man who seemed to become complacent at being automatic first choice for club and country.
Hart has admitted that he is working even harder now to not let that happen again.
“I just knew I had to work hard and try to get to the best level I can be, and that’s no different now,” Hart said.
“And I want to give the best options for the manager. I’m living in the moment, I’m enjoying things.
“When I was out of the side I worked hard to try to get back in. I tried to do my best and that’s the same now.
“I’m constantly trying to improve, still trying to cling on to being a young guy.
“I’m trying to improve daily so I’d like to think I’m in a better place than I was four years ago, for the experiences in that time.
“I want to keep improving. The day I stop trying to improve is the day that I finish.
“Hopefully I’ll be going on that track for a good while yet.”