First things first, ensure you added enough salt. Home cooks often don't add enough salt to their dishes, so go ahead and add a pinch if your chili is lacking in flavor. Then, adjust the spices. For example, we love adding a teaspoon or two of chipotle powder to add a smokey and spicy taste. If you don't have that, try smoked paprika and more chili powder, or experiment with cumin, dried oregano, and cinnamon. Finally, get creative with the toppings. Try lime juice, cilantro, hot sauce, nachos, sour cream, yogurt, shredded cheese, or vegan alternatives.