Intensify the flavors of meat, poultry and fish with high-heat cooking techniques such as pan-searing, grilling or broiling, which help to brown meat and add flavor. Just don't overcook, burn or char meat.
Roast veggies in a very hot (450°F) oven or grill for a sweet, smoky flavor. Before popping them into the oven, brush or spray lightly with an oil that has a high smoke point and sprinkle with herbs.
Caramelize sliced onions to bring out their natural sweetness by cooking them slowly over low heat in a bit of oil. Use them to make a rich, dark sauce for meat or poultry.
Pep it up with peppers! Use red, green and yellow peppers of all varieties — sweet, hot and dried. Or, add a dash of hot pepper sauce.
Add a tangy taste with citrus juice or grated citrus peel: lemon, lime or orange. Acidic ingredients help lift and balance flavor.
Use small amounts of ingredients with bold flavors such as pomegranate seeds, chipotle pepper or cilantro.
Give a flavor burst with condiments such as horseradish, flavored mustard, chutney, wasabi, bean purees, tapenade and salsas of all kinds.
Until all that moisture evaporates out of the pan, you're not really going to get any Maillard reaction at all, which is where the browning (and subsequent flavor) comes from. For ground beef drippings, you want to pour that off first, and then do some browning.