I made one spreadsheet for going through dating profiles in OKCupid.
I don't remember many details from it anymore - maybe my current girlfriend I've been with for more than a year now was the about 200-300th profile I crashed upon. And maybe there was a 15% chance that a profile I liked answered my message once and never again.
.
Finding a partner may also need persistence.
I was determined enough to find someone beside me. I worked with my goal and with that spreadsheet for months, having pauses here and there.
Why the spreadsheet? Cos (I like 'em plus) I wanted to know and MEASURE, how much work my goal needed to for it to be accomplished (in my case, under these stars and circumstances).
(I didn't pay for the service.)