If you’ve been waiting all year to cross items off your wish list, or want to get your holiday shopping completed quickly, now’s your chance. Black Friday sales are almost over — so it’s the perfect time to shop some of the lowest prices of the year on tech, beauty products, apparel. As a reporter who’s covered this sale for five years, my number one tip when shopping holiday sales is to act fast: When you see something that catches your eye, add it to your cart and checkout. That’s…