You don't have to make any effort in order to enjoy a beautiful sunset. You need only to be there, to be there mind and body together. But if your body is there and your mind is in the past or in the future, then the beautiful sunset will not be there for you. There is a kind of energy that helps you to be there body and mind together. That energy is called mindfulness.
Mindfulness is the capacity of being there body and mind united.
When you drink your orange juice, drink mindfully and you will enjoy your juice because you are really there one hundred per cent. If your body and mind are united when you contemplate the beautiful sunset, it means that you are mindful. Mindfulness helps you to be there in order for the beautiful sunset to be there too. To meditate means first of all to be there, to be on your cushion, to be on your walking meditation path. Eating also is a meditation if you are really there, present one hundred per cent with your food.