Mental domination is a powerful thing. It took us years before we were able do a scene that was 100% mental only. I think that's because it relies on both the dom being creative and able to put him/herself completely into another persona and the sub being able to get into the right, totally receptive frame of mind.

From our experience, the giving and taking of orders was the path to mental domination. The difference between submissively sitting there and letting someone handcuff you and having someone pass you handcuffs and order you to put them on is substantial. You submit twice as much when you do it willingly to yourself.

One of the most incredible experiences I've had was lying on my back and being ordered not to move. I'm not 100% sure how she managed to get me into that space, but there was no physical bondage, and no real physical punishment--save for the odd twisted nipple and slap on the cheek. It was all about the orders, and the following orders. It lasted about an hour I think...and I orgasmed--but didn't come. I didn't think that was possible without some physical contact (and I was forbidden from removing my hands from my sides, if that's what you're thinking) but it was one of the most incredible climaxes in my life.

I'm not sure if I can give advice on how to "get into" mental domination--but maybe a description of my own experience will help.