Pondering on accessibility, I think it helps to reframe the discussion as "access for all" or "doing this thing makes things better for lots of people." For instance, having materials in large type is great for anyone with vision problems. This includes people who don't identify as disabled or "low vision." Eye strain blah blah.
Marked chairs for people who are hard of hearing benefits tons of people. Sometimes a certain room is hard for someone to hear in or someone's ears are clogged from flying. Being able to easily sit up front is great.
Um. Things.
I also think it's important for persons doing accessibility to have some sense of disability rights and culture. This is more relevant for people who are able bodied. I found it enormously helpful to spend some time reading blogs etc
Re: Venues for change
Large print signs that identify rooms that stick out into the hall (like this: http://www.flickr.com/photos/juliastarkey/525390514/) help everyone. It makes it much easier to figure out where rooms are.
Marked chairs for people who are hard of hearing benefits tons of people. Sometimes a certain room is hard for someone to hear in or someone's ears are clogged from flying. Being able to easily sit up front is great.
Um. Things.
I also think it's important for persons doing accessibility to have some sense of disability rights and culture. This is more relevant for people who are able bodied. I found it enormously helpful to spend some time reading blogs etc