Gosh I was hoping that someone would of posted some good suggestions. I have recently "come out" I guess you would say to my current partner. He was extremely responsive and I can't tell a Dom how to be a Dom really. If I could provide him with some reading I think it would be very helpful.
Hang out in the BDSM forums here and ask questions, and/or do the same at Fetlife.com.
Plain old communication/talking about fantasies/experimenting tends to work well... Doing a Google search for BDSM Checklist if you need help with topics of conversation.
If that doesn't work -
When Someone You Love is Kinky
The New Topping Book
The Loving Dominant
Screw The Roses
The Master's Manual: A Handbook of Erotic Dominance
SM 101 A Realistic Introduction
Partners in Power: Living in Kinky Relationships
All are available on Amazon.com; take everything you read with a grain of salt. Relationships are relationships are relationships... even power based ones.