Dr. Majeres is an excellent psychiatrist when it comes to advice on Sleep & Anxiety.

His podcast can be found here.

Episodes on Sleep:

#4. How to Get Effective Sleep

#5. Victory of Tiredness

#24. The Key to Mastering Sleep

#26. Overcoming the Afternoon Slump

#36. Early to Rise

#61. Sleep: A Skill You Can Learn

#91. Boost Your Sleep Skills

And on a similar note, some breathing exercises can help as you try to get to sleep as well:

#48. The Breath of Life