W3Schools saved my sanity today. Really
I am currently our Division’s interim webmaster. Today I was trying to insert some dates among pictures that had a custom css class. I could not for the life of me get the dates to stay in the right place. After some teeth grinding and a muttering stroll down the hall, I thought to go to the custom css class definition and found that it contained a float tag.
W3Schools is your friend. Know it. Use it.