I'm always researching. I go to the public library a lot and I usually have a black marble notebook with me. Even if I don't check out any books to take home, I flip through some books there. If I find any information that I even think I might use sometime, given the subjects I write about here on HubPages, I will write down the full title of the book, the name of the publisher, city published in and the year published, and the page number the specific information is on, I and keep that information.
In other words, I am constantly in a state-of-research. Therefore when I sit down to write a hub, I do not have to make a separate task of researching it. I already have the statistics, information, quotes, and all the citation information I need at my fingertips.