I love "Bedtime" by Yogi tea.
Every night I make myself a cup, take it to bed and read anywhere from 5 minutes to 2 hours.
It's nice. I like it. I don't do a very good job relaxing most of the time but I think I've nailed this.
Here is the link if you want to see what the box looks like.
You will thank me...
Oh and it contains Valerian Root which my father says makes you have crazy dreams. So that's another bonus!