Below is a link for a talk from Thanissaro Bhiku that discusses and provides a bare outline of instructions for breath meditation that differs a bit from (most) standard approaches to concentration/samadhi. It presents an approach that doesn't make a significant distinction between insight and tranquility meditation. I hope it will be helpful to those seeking to untangle the confusion/contradictions related to concentration practices and how they are taught, etc.
I have found this instruction/perspective/practice very helpful. Though as with all dharma, you have to feel your way to the place that's right for you--maybe realizing well after the fact that you were already there to begin with:
The talk title is "The Teachings of Ajahn Lee" given on 2011-04-25
http://www.audiodharma.org/teacher/16/
If this is interesting to you, seek out Ajahn Lee's teachings in these books:
Inner Strength
Keeping the Breath in Mind
Regards,
B
