Spend at most one hour in a gym lifting and take shorter rests between sets.

Trust me I friend my legs one time training too much for 3 months and I couldn't train them for a long time, I mean like half a year.It was the worst training setback in my life . So yea basically try to stay under an hour because it saves time and prevents over training . Also if you train too long , your intensity goes down and you won't gain as much on the muscle being worked.I can almost bet 99% of people's lives are busy, so sometimes fitting in a weight lifting schedule and making all that food seems impossible .But there are things you can do to manage your time better.Don't worry it won't be IMPOSSIBLE to do UNLESS...

You are studying medicine in a university , you have a job that works you late into the night, you live in a house by yourself so your cook, mow the lawn and take care of all the maintenance yourself , the closest gym is five hundred miles away and the quickie mart is 100 miles away, you have a ten year old scooter and no car.

Maybe you're broke and have just one ten pound dumbbell and a bent in half bar with one five lb. plate. Or your friends make you go to the bar every Friday and you always get a hangover. Maybe you Have to visit and take care of your mom every weekend and yea , I think you got the picture.