Property law

Why oh why do they have to use terms like "servient estate" and "dominant estate" in property law? For some reason, I can't get this terminology to stick in my head and keep having to force myself to remember which is which.

For the record: the dominant interest is the one who has a right to do something (like cross your land to get to theirs)
The servient interest is the one upon whose land the easement exists. (Like the owner of the path from your land to the road)

Fun, isn't it.