Michael guided the second session on Concentration as a Factor of Awakening, offering two guided meditations (one as taught him by Ajahn Thanissaro, the other in the tradition of Ajanh Sumdeo) which might help one easily sink into samadhi. These bracketed a recorded talk on concentration by Gil Fronsdal.
http://zencast.org/zencast-404-right-concentration
Burlington Buddhist Sangha 