But what happens if you strip away the conveniences of today's high-tech, "we want it now" world, and try to lose the weight the hard way?
One Colorado woman did just that and succeeded, losing 300 pounds in nearly three years all on her own, with no surgery or gimmicky diet to take credit.
"There is no magic bullet," Shannon Davis told "Good Morning America." "You cannot lose weight without putting in the time and effort.
"It's not easy. It's simple sweat equity."
And sweat is certainly something that Davis -- a 39-year-old master's degree student who also works full time and cares for her mother -- knows something about.
She is now committed to a seven-days-per-week workout routine that consists of an hour of cardio for four days and weightlifting with her trainer the other three.
That is a far cry from where Davis found herself three years ago -- a 589 pound woman unable to leave her Broomfield, Colo., home, much less jump on a treadmill.
"I was afraid to go out," Davis told "GMA." "I knew people would stare, judge me and make comments about me."
Comments from her friends made her say enough was enough. They warned her she was going to die if she didn't change.
So she got off the couch and headed for a local gym, but couldn't even make it one step on the treadmill.
"There was no way I could walk on the treadmill at 589 pounds," she said.
But she kept moving.
"I'd go back to the pool and walk back-and-forth for an hour," Davis recalled of the first days in her weight-loss journey. "I didn't want people to see me. I wanted to be invisible.
"Things have changed a little bit," she said.
Gaining While Losing
Changes for Davis have come not just on the outside -- she now stands as literally half the woman she used to be -- but on the inside as well.
She no longer beats herself up over food cravings and has learned to enjoy an indulgence, in balance with her everyday, healthy diet.
"Everybody messes up," Davis said. "That's the thing about dieting everyone needs to learn: Everyone makes mistakes."
Davis says she follows a healthy diet of three simple meals per day, and stays satisfied with the reduced intake compared to her previous daily calories by focusing on the quality of the food, not the quantity.
"I eat quality food," she said. "Lots of greens, lots of vegetables, lots of lean meats. I love apples."
But that doesn't mean she's immune to cravings. She has learned, over a long, hard three years, how to handle them.
"If there's a cookie around, I want the cookie," Davis said of her favorite treat. "You have to forgive yourself and you have to indulge on occasion."
But indulging for Davis now means celebrating with friends, not food, something she would have never even considered three years ago when she spent her days alone in her home.
This weekend Davis will host a "300 Pound Down Party," bringing together the network of friends from across the country she's assembled along her journey down the scale.
Each friend is on a path similar to Davis', an element she sees as crucial to her weight-loss success.