I leave for Kathmandu in 22 days. Most travel to Tibet begins in Kathmandu or China and you can only go with authorised tour operators. I am travelling with Karnali Excursions with whom I travelled in 2012. They are beyond fabulous!
http://www.kailashtrekking.com/
This year I have planned and been able to get ready early so I now have time to post some of the 'getting ready' joy and challenge over the next few weeks.