I have a typewriter, but I found out the hard way that it doesn't work any more (hmm! It's only been in the bottom of the closet gathering dust for three years--what's the problem?).
For the Ye Olde Paper Secondaries, I've been using the Ye Olde Cut and Paste Method: Print out responses on the computer, cut them out (with Ye Olde Scissors), tape them to secondary, copy secondary, send copy of secondary.
I know this is Low-Brow, but I'm not as computer-savy (or is that computer-geeky? 😉) as some others on this board. So far my barbarian method has worked fine, but I dread the day I recieve a COLORED paper secondary! But I have at most 2 more secondaries to go, so this seems less and less likely...