I usually start with Food Wishes, Serious Eats, or the New York Times. Julia Child for French food, Just One Cookbook for Japanese food. Budget Bytes when the bank account is looking a little thin. Dessert Person when I have a lot of time and want to knock the socks off my friends.
For Chinese I usually hit up the Woks of Life, but sometimes I just search the name of the meal and compare recipes, like with beer duck or more specific regional dishes.