Everything in the universe is made up of consciousness. When you are grateful for something, you are loving it. To be grateful for is to appreciate. Love is appreciation. Love is attraction. The law of attraction is really the law of love. Therefore to attract more of those things you desire, you simply have to focus your consciousness of love towards them. Value and appreciate them.
It is when we give thanks for the things that we think are small, that we see significant effect. It is harder to see much change when we appreciate the bigger things since they change at a lower rate. You should appreciate big things but you should also appreciate the small things. Big things have a lot more energy to sustain themselves than small things. When you give your attention to the small things, they can use your energy to result in a lot more difference. Every little increase adds up to a whole lot.
Appreciate the little and the little becomes a lot. Do not despise the day of small things. It is when something is little that it has more need for appreciation to grow. The beginning is the most important time when positive energy is needed for sustenance and growth. The emotion of appreciation is like sunshine on a seedling. You will see a lot more growth from a seedling than from a plant that has grown for some time. Do not give your love only to the big things, but give it abundantly to the little ones as well.