There are so many promises found on the side of beauty and personal-care products, it can be confusing what's legit and what's pure marketing. Two marks worth looking for are the USDA certified-organic mark, which means at least 95 percent of the ingredients used in the product are made from organic ingredients and the rest are nontoxic or all natural. The other one is NSF certification, which means that at least 70 percent of the ingredients used are certified organic.

Starting Oct. 1, my new television show "Naturally, Danny Seo" will air every week on NBC. The show brings the pages of both my magazine and this column to life, and I'll be offering healthy recipes, easy upcycling projects and have a regular segment sharing my best Do Just One Thing tips. The show will air for a full 52 weeks, and we will highlight amazing designers, entrepreneurs, community activists, chefs and more who are changing how we marry the worlds of style and sustainability. Hope you can tune in!

If you've driven your car more than 30,000 miles, it's time to replace the spark plugs. Over time, spark plugs can become covered in carbon deposits, which makes them work harder and decreases your car's overall fuel efficiency. When your car misfires -- when the engine stops for a brief second and keeps on going -- it's a sure sign that your spark plugs need replacing. Misfires increase exhaust emissions, which can negatively impact your overall miles per gallon, too.