The best way in my experience so far (which goes back quite a long way) is to maintain useful information by means of the bookmarks feature.
Useful information is generally something that should be shared so it is public at some point. The exception is if it would put someone in danger. A message should be a message and no more simply as UKP isn’t geared to private relationships.
The other way, as another experienced member mentioned recently, is to keep track of one’s own who’s who of shags by means of one’s reviews. Apart from the common decency of giving something back, it’s a good way of working out which p4p when the numbers and fake names merge into an overall similarity.
