We could all use some practice in the grammar area. No matter how correctly we think we speak, often questions arise about the use of a particular word or phrase. The beauty of the internet, besides being able to find and prescreen great restaurants anywhere in the world, is the free access to some great websites that provide a fun (sort of) way to get in some grammar practice in between Facebook stalking.
Here are two places that provide some painless grammar quizes and help you decide whether to use lay, lie or laid. (maybe)
http://roadtogrammar.com/
http://www.chompchomp.com/menu.htm
P.S. If you can't identify the grammar error in this posting, you really need to hit these sites hard.