I teach Spanish, so I use letters with accents all the time:
alt 0191 = ¿
alt 0225 = á
alt 0233 = é
alt 0237 = í
alt 0243 = ó
alt 0250 = ú
alt 0241 = ñ
This one: alt 0233 = é might be good for people who do appliqué. Make sure if you're using a regular keyboard (not a laptop) that you have the number lock on for the numbers on the right hand side.