First of all, it takes true laziness to get really fat. Anyone can have a few extra pounds, but obesity doesn't just happen. Fat is ugly, it's true. And again, a few extra pounds is not what I'm talking about, I'm talking about trying as hard as you can to move as little as possible.
Next step, hygiene. It's not hard to shower every day, it really isn't. Or every-other day, if you can get away with it. Having a clean body and clean hair contribute so much to beauty.
And this gets to hygiene.b: Hair maintenance and removal. A nice simple, well managed haircut is easily obtained by anyone. It doesn't take $300 to have a great haircut. $10 to $15 should do it at a national chain. Even there you can find a stylist you like and trust, tip them well to treat them well and you get the salon look at the discount price. And good shampoo and conditioner and styling products can be found at Target and Walmart for economy prices. Spend a little extra time making sure the products you're selecting are right for you. Learn to work with your natural hair texture to make styling easier on you and make your natural beauty shine through.
Hair removal. The most important thing you can do for your over-all beauty is finding the right eyebrow shape. Seriously. Your brows shape and frame your face. Bushy, overgrown eyebrows says "I don't care" and over-plucked pencil-thin brows say "I'm a porn-star in training." It's easy to find eyebrow tutorials online, but if you're completely lost, you might want to consider professional help. A good eyebrow wax can help create a shape that flatters your face. Many chain salons do these types of services as well. Make your dollar stretch further by maintaining the shape for as long as you can with your tweezers at home. All other hair removal (legs, facial, bikini) are secondary to your brows, but over-hairy (in America, anyway) = unhygienic and ugly.
On to make-up. You don't need a lot. I learned this tip from a magazine years ago, and it stuck with me ever since. Put your mascara on first. The second your eyelashes are darker and more defined, everything else falls into place and you'll use less of the rest of your make-up. Spots are less pronounce, dark under-eye circles are instantly lighter, your cheeks are rosier. Most days the only make-up I wear is black mascara. My skin thanks me for that.
Okay, your body. I know this is a touchy subject these days, but eating healthy isn't really that hard. What it comes down to is eating REAL food. Cook, even if it's just microwaving frozen veggies. Just read the ingredients on the bag or can, as long as you recognize what everything is, you're good to go. The other thing that hurts us is our sedentary lifestyles. Working in offices and sitting on our asses all day really hasn't done us any good. And the dependence on cars in this country, it's a shame. It doesn't hurt to walk or ride bike to work. It's good for you and the environment.
I would never say everyone has to be a size two. My ideal body on my 5'9" frame is 150-155 pounds, solid size 8, nice toned abs, legs and arms, and that little bit of fat that sticks out when I wear a tank top is gone. And I know I can do it.
Don't let your laziness turn you into an ugly woman. More than anything, every woman deserves to be beautiful. Beauty isn't easy, but it's not lazy, either.