Remember that whatever you give you receive. If you think of the Law of Attraction as a mirror or echo it will help to remember on what to feel and imagine. You reflect back everything that you give.
When you imagine anything positive that you want and love you are harnessing the force of love. When you imagine something positive, something good and you feel love for it, that is what you are giving.
Must read book to put you in flow and give you positive thinking methods: " The Power" by Rhonda Byrne.