Books usually outdated but, I learned my nitrogen cycle through there
Magazines I find that the forum has more reliable information just because it's published doesn't mean it's true, I got a magazine for christmas suggesting a 45 gallon tank for an oscar,
Internet pretty much all my information comes from here but nearly half teh information is wrong or misleading
LFS never don't trust any of them after getting six african cichlids in a ten gallon tank and a load of bs from some kid about bettas
Meetings well I'm involved with a local forum if that counts, and many of those folks are involved weith the aquarium society
Bottom line trust nothing nor nobody always crosscheck and use any source you've got