A lot of the suggestioins here are really more applicable to a couple already somewhat experienced in this type of play. My advice to you, as a couple, is to start slow and with the known; the blindfold is already a huge change. If you immediatly jump to tingling creams and candle wax the party may end very fast and very rudely. Give her a chance to get use to being felt up, teased and pleasured, while blindfolded and/or bound, use what you know pleasures her. Then, when this is something that she already looks forward to, experiment.
May I sugeest rather than a screw in the wall. Go to home depot - they sell over the door bathrobe holders, but 2. That way she is tied spread eagle sort of!
Hope it all went well. Try a cold banana. Insert it then fuck slowly..there's this whole cold going to warm experience. Messy though.
" I don't know the question, but sex is definitely the answer"
Woody Allen
The emphasis during blindfolded foreplay should be on doing everything slowly, but alternate between very soft touch and an occasional more forceful play. Massaging her clit and vagina with lots of oil always seem to get the desired results :-)