I had no clue when I first joined. then I saw a video by @jerrybanfield in his Basic Training series of videos. I now have them written down and I also joined LastPass.com and stored quite a few passwords and keys in there. Now I just go to a site that is saved in there and if it doesnt log me in automatically I type in my username and right click the password box, choose autofill, and if the site is save in LastPass all I have to do is click it and I am logged in.