This site contains the most common 1000 Chinese characters, which is arranged from the high usage ratio to the low usage ratio. Then you can know the most basic and useful Chinese characters quickly.
The order of strokes of Chinese characters are traditionally classified into eight basic forms, each appearing in the character "eternally" and according to their contemporary names("Dian", "Heng", "Shu", "Gou", "Ti", "Pie", "Duan Pie", "Na"). Though somewhat arbitrary, this system has remained popular for nearly two millenia. Go to this page to learn more about the order of strokes of Chinese characters.