How to keep your carpet looking new long after it isn't.

Vacuum well and often.

Vacuum well and often.
When dirt is the enemy a vacuum is your best friend. The best models use dual motors—one for the suction, the other powers the beater bar. Look for good filtration and a brush height adjustment that suits your carpet. Experts recommend that you vacuum at least twice a week, sometimes more often in high traffic areas.
The two main culprits are right under your feet.
Day in and day out, nothing brings more dirt into your home than shoes. One solution is to keep a mat outside the door for brushing off some of the dirt and grime from your soles. Another great idea is to remove your shoes at the door and wear some "indoor-only" slippers around the house.
Become a traffic cop.
Heavily used sections of carpeting will show the most wear over time. This is where area rugs and runners can help. Place them in front of and under heavily used furniture. And speaking of furniture, try redefining traffic patterns by rearranging it occasionally. Because heavy furniture can leave permanent indentations in your carpet, you should always use furniture glides.
Avoid direct sunlight and clean stains immediately.
Like your skin, carpet ages faster when it is exposed to UV rays. The more you can protect it from direct sunlight by closing blinds and drapes, the longer it will last. As for stains, they're easier to remove the sooner you attack them. Start by applying liquid or dry carpet cleaner with a lint-free cloth and blot, never rub. Let the area dry and remove the residue with a plastic scraper. Then, you guessed it, it's time to vacuum.