2. "Peace Is Every Step: The Path of Mindfulness in Everyday Life" - Thich Nhat Hanh. Also good, but found it a bit repetitive. Maybe because I'd already gone through the first one.

Edit: My advice is to read the book so that you enjoy it. After a little bit of practice, you'll find that when you want to sleep, just meditate a little bit. The mind will feel lighter and you will automatically drift to sleep. Don't force yourself to shut off your mind, let it happen gradually. Observe yourself when you drift away. In short, cherish the process, don't take it as an exercise.

B. Stahl & E. Goldstein, A Mindfulness-Based Stress Reduction Workbook