Article: Straightening hair--particularly hair that's naturally curly or frizzy--is hard on it, so you'll need to prepare it with a gentle shampoo and a rich, smoothing conditioner. Use gentle, sulfate-free shampoo to avoid stripping your hair of its natural oils. It's going to need them for protection against the heat styling you're about to do. Use a rich, hydrating conditioner, and then, for extra protection, use a leave-in conditioner. If at all possible, avoid drying your hair with a blow dryer until your hair is damp or nearly dry to minimize damage. Dry your hair using either a cotton t-shirt or a microfiber towel using a squeezing, blotting motion, not a rubbing motion, which causes breakage. You'll only need a dime-sized amount at most--any more will weigh hair down and leave it limp. Look for products that protect and moisturize hair, like blow dry primers, frizz-control sprays, or smoothing balms. Use a round bristle brush to pull your hair straight as you dry it. Direct the nozzle down as you dry to help prevent hair from frizzing. Get hair completely dry before moving on to flat ironing. Be patient. This step may take some time, particularly if you have very curly or frizzy hair. If your hair is too curly to make the conventional brush-and-blow-dry method workable, you can try setting your hair in large rollers and sitting under a hooded dryer (if you have one) or setting the curlers before you go to bed at night and straightening with a flat iron in the morning. Once your hair is completely dry, pull the top layer of hair into a temporary ponytail or bun, then begin straightening hair in 1-2 inch sections. If you have a temperature setting on your flat iron, use the following as a guide: for fine or damaged hair, 250-300 degrees; for medium or average hair, 300-350 degrees; for thick or coarse hair, 350-400 degrees. Use a comb to pull your hair taut and away from your head with one hand. With the other hand, iron the section of hair in one fluid motion from root to end. Repeat if necessary until the section of hair is straight. After you've straightened the bottom layer of hair, undo the bun or ponytail holding the top layer of hair. Then begin straightening the top layer, using 1-2 inch sections. Don't use a flat iron on wet or damp hair--it can literally break your hair. Use a finishing serum to smooth hair and add shine. Serums are generally best for coarser or thicker hair, while sprays are best for fine or normal hair.
Question: What is a summary of what this article is about?
Wash with gentle shampoo and rich or smoothing conditioner. Dry your hair. Apply a small amount of straightening product. Blow dry your hair. Flat-iron your hair. Apply finishing serum or spray.

If you dislike olive oilor simply don't have any on handsubstitute the same amount of another vegetable oil, such as coconut oil. This won't change the flavor of the roasted Brussels sprouts, and will prevent them from sticking to the pan just as well as olive oil. Coconut oil may slightly alter the flavor of the sprouts. It may give them a very mild coconut taste, and will also make the sprouts taste sweeter. Other types of vegetable oil you could use include safflower oil, sunflower oil, peanut oil, or sesame oil. If you're in a rush when preparing baked Brussels sprouts, you can save time by cutting the sprouts in half before mixing them with the olive oil and salt. Then, instead of roasting the sprouts for 40-45 minutes, roast them for 20-23 minutes. Keep the oven at 400F (204C); you don't need to alter the baking temperature. Use a sharp knife to cut the frozen Brussels sprouts. They'll be a little tougher to cut than thawed sprouts, but can be cut in half relatively easily. If you'd like your roasted Brussel sprouts to have more flavor, add tangy, sweet balsamic vinegar before drizzling the mixture over the frozen sprouts. Mix 3 tablespoons (44mL) of balsamic vinegar with 12 cup (120mL) of olive oil before pouring the mixture over the top of the sprouts. Once they're mixed, pour the vinegar and oil over the sprouts and add salt. You can purchase balsamic vinegar at any grocery store or supermarket.
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One-sentence summary --
Replace the olive oil with coconut oil. Cut the sprouts in half and bake half as long for quicker sprouts. Add balsamic vinegar to the olive oil.