I always mix up class and id in CSS. “Is class a dot or a hash?” “Is id a period or a pound?” So early on, I came up with a quick brain trick to help me remember which is which.
For id, the symbol is a # (hash or pound depending on your dialect). For this, I think of an id number, as in “My id is #43368″.
For class I think of the word period, and how in school we used to have a break period in the middle of the day for lunch. I imagine all these little dots sitting at their desks, and the bell going off.. end of class.
I’ve been learning how to code things with google maps today, and came across the google maps api blog. A new feature lets you get mapping results with a preference to a certain country. They encourage you to play with 

