This evening I had a moment that passed by so quickly that I cannot remember all of the details of it. My mind interpreted an emotion as something negative and unwanted. But a moment of awareness bubbled up and I reminded myself: "It is okay to feel this way. Experience it. It will pass." It was only a small step and I realize that I have further to go, but it was very encouraging.
Zen Habits posted an article entitled Letting Go of Attachment, from A to Zen, bring short tips from A to Z on experiencing without attachment, letting go of attachment to people, letting go of attachment to the past, letting go of attachment to outcomes, and letting go of attachment to feelings. I've printed it out so that I might remember to read it when I am forgetting to let go.