There are tourist information offices in most of the main cities in Turkey. These offices can provide info on sights and cultural events, and some have accommodation-booking services that can be useful if you arrive in a destination without a hotel reservation.
Turkish Culture and Tourism Office. www.goturkey.com.
There are hundreds of websites about Turkey; these are some of the standouts. For everything you'd want to know about Turkey before your trip, from Atatürk and his role in history to religious festivals, to sample authentic music and more, check out www.goturkey.com. The Turkish Cultural Foundation’s websites for culture (www.turkishculture.org) and food (www.turkish-cuisine.org) are comprehensive resources as well. Beat-by-beat news on city life in Istanbul, Ankara, and elsewhere around the country, as well as details about what's going on culturally, can be found at www.mymerhaba.com. For an expat perspective on life in Istanbul, as well as plentiful event listings and news, check out yabangee.com.