This is such an easy project. When I was done I wanted to decoupage everything! It all started with some beautiful napkins I had but didn't want to use as napkins. Please pardon the pictures. I'm afraid some of them didn't come out very well, but this is so easy, you'll have no problems.
White Glue and Water (50/50 mixture)
Item to be decoupaged (this can be pretty much anything, in this case I have used glass votive holders)
Since this votive holder has no contours, I just cut a strip of napkin slightly wider than the height of the votive holder and long enough to wrap around.
Paint the glass with the glue mixture, lay it on the napkin strip and simply roll it so the seams overlap. Then paint on top of the napkin as well. This ensures it will have very good adhesion and will provide a protective coating.
There will be extra napkin at the top and bottom of the votive. Here you can either cut the napkin along the top or fold it to the inside. Either way, be sure you seal it by just painting the glue mixture over top.
Done! This took less than 5 minutes from start to finish.