Onions are one of the core ingredients that can pack a lot of flavor in dishes, and can be prepared a variety of ways. You can lightly brown onions and add them to soups and sauces for a slightly sweet, powerful flavor. Caramelize them for a sweet, buttery flavor with a soft texture, perfect for topping pizzas or salads. You can even add them raw for a strong, powerful kick, commonly done in dips or appetizers.
Sad thing about preparing onions is that it's easy to feel as though you're going to cry from the aroma of freshly cut onion. Here's some tips for dicing onions quickly and easily. If you aren't fully comfortable with your knife skills yet, take your time as you don't want to cut yourself. Always be aware of where your fingers are and you'll be sure to prevent cutting any fingers.
2. (Figure 1) Cut the onion horizontally, about 3-4 times for a medium onion, equal distance between each cut.
I hope this helps, and feel free to share any of your onion cutting tips in the comments!