DH found that the most helpful thing was sleeping in a recliner- not that you should go buy her one, but maybe see is you can help her find one to buy, or borrow? Thrift stores?
He also found it handy to have some sort of bed tray or solid surface/box so he could put drinks, remote control, pens, etc in it and everything would be THERE, instead of having to get up to find things. I bought him something that looked like a plastic shoe box to put stuff in, and also a lap board so he could balance his laptop more easily and it'd stay in one place and level when he was using it.