I gotta say, anytime someone says anything remotely like that I can almost guarantee they won't start working out or watching what they eat. Either you've gotten to the point where you're willing to do it now, or you won't. If you want this, stop making excuses to put it off and start tomorrow. Go to the gym; even if it's just 15 minutes walking on a treadmill. Go and do something; start now.
I say this as a guy who has said those same excuses many times