Midnight in the mirror
I'm sure you've heard this story before.
Begin by staying up till 12 midnight. (Preferably with friends on a dark night.) At the stroke of midnight, comb your hair 100 times. After this happens, the mirror will reflect the face of the person you will one day marry!
I haven't ever tried this, but let me know if you did (Check my guestbook.) Frankly, I'm not too keen on trying it myself!