Well for myself I sleep in my locking ankle cuffs which are themselves locked to a chain which is attached to the bed with quick release clip should that be necessary.

I also wear my cuffs to bed which are themselves attached to the head board of the bed, but with enough slack that i can move my arms in sleep should I need to.

I enjoy sleeping like this, it is very comforting and it gives Master access to what is his at all times as well, which works rather well for me.