Try dating women you used to date or have a crush on back in high school/college. How you see them is strongly influenced by how you remember them.
Personally, I can't imagine dating some girl under 30. They're just not interesting enough.
I had lunch with a girl I was fairly serious with back in like 9th and 10th grade, but when we were about 36. It was eye-opening to be sure. I remember her being this sweet young thang, tight buns, blooming boobs, fit and athletic (we both were on varsity squads in 9th grade, she was a 3 sport athlete at one point). At 36 she had changed DRAMATICALLY. Started smoking at 17 so she looked maybe 10 years older than 36. Had 4 or 5 kids and hadn't kept up on any sport, and it showed. Her boobs never really did come in, and it wasn't attractive as she was at that point about a 3.5 on that scale posted earlier. She kept saying how much she wished we had kept in touch, and it made me very uncomfortable. She probably wouldn't feel that way now that I have gone off the deep end of the BMI pool, but at that time I was in my 5th or 6th year of serious krav, something like that, and I could nearly dunk it if I just had longer fingers and could truly palm the ball. Size 36 waist, could squeeze into a 34 if I had to, 6'1" ish, so I think I was not too bad looking all things considered. It was a very weird lunch and I have never seen or spoken to her since. My how time changes things, doesn't it?
That said, I had an eastern european Goddess come to my door on Saturday, selling some kids book series or something to help her get through some dept of workforce services training program. She was from Estonia, and the scandinavian mix was showing big time. She was maybe 5'9" or just a little taller, thin and thick in all the right places, maybe 130 lbs, easy C cup with the booty to match, wearing short shorts and a top that was just short enough to show off her almost-a-6-pack flat belly, blonde, perky little nose, eminently kissable lips, and large deep crystal green eyes you could just sink into. She had a silvery laugh and moved like an angel. And smelled intoxicating. I had to get a grip and remind myself she was about the same age as my son who just had our first grandchild, oh and remind myself to make sure my mouth wasn't open the whole time I watched her spiel, probably the most interesting set of children's books I have ever seen presented, or maybe they were candles, or something. All I know is there was some kind of sign up sheet with orders...all from men in the neighborhood, nary a female name on the list. But man oh man if the opportunity presented itself if something happened to Mrs. Grad (as trout said), I would be on that like a BYU coed on a twinkie.
. I was tempted to link my dating profile here as I don't have anything too embarrassing but I have second thoughts.