Regarding reference management: I use Wikipedia as my personal citation tool. Whenever I come across an interesting idea, fact or study, I add it to the relevant Wikipedia article, with reference. That way, all I have to remember is which article I used, and that is not a problem for me. If someone else deletes the material, which is exceedingly rare, I can still find it in the article's history by going to the last version that was edited by me. On a few occasions, people have helpfully updated the article with newer research, pointing out that my referen...
I don't use the watchlist; I found that it sucks up way too much time once it contains a couple hundred items. If I vaguely remember a fact I added to Wikipedia, I can usually quickly come up with an approximate title of the article or with a search that will bring me there. (Instead of Wikipedia's internal search engine, I use Google with "site:en.wikipedia.org" which is faster and better.)