Store them in a cool, dry place away from direct sunlight. When storing in the refrigerator, coat them with lemon juice before placing inside a container. Store cut avocados with onion chunks to prevent browning. A quick way to season Avocados is by adding a bit of pepper, salt, balsamic vinegar and olive oil over them. Mash and spread them over toasts and sandwiches or slice them up and add to salads. You could also grind and blend into yummy dips or salsas.