Use a heavy-bottomed pot or Dutch oven for even heat distribution and to prevent burning. Brown the meat in batches to avoid overcrowding. Simmering is essential for flavor development. For thicker chili, mash some beans during the last 10 minutes. Adjust spice level to taste. Leftover chili tastes better the next day. Variations include vegetarian, spicy, smoky, chunky, slow cooker, and spiced-up versions.