| If there's a good college nearby, contact their French department and ask them what textbooks/grammar books are helpful for that particular level. I heard of one called "BLED" that's supposed to be really helpful. You're probably looking for beginning/intermediate French.
Also, find out what the AP books are. If you like any popular, simply written books in English (like Harry Potter), see if you can find a French translation. Or read something easy to understand, like "L'etranger." That's a great way to pick up vocab.
Find these books at the library, and teach yourself out of them. For listening, watch a bunch of French movies and listen to a lot of French music. See if you can find any French children TV shows.
Also, go online and find streaming French radio/TV news broadcast. Listen to it as often as you can. Read French newspaper articles, especially if they deal with subjects that your'e interested in.
This is basically what they do in French 4 and college-level intermediate French. | 
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