Try to understand every part in the structure of a character. Practice makes perfect. But, don't worry. Even we Chinese often make mistakes. So try to write characters a lot and see how many of them you can recognize. You don't have to know every characters. Studying the frequently used ones can save your time and make your learning more effective and productive.

记得我们还是小学生的时候，我们也要默写生词，等认识的字多了，看到生词一下就能记住。因为汉字大部分都是由固定的偏旁部首组成。 另外，先学容易的字，然后复杂的字是由简单的字组成。例如：先学“言”字， 而“请”字则是“讠”和“青”组成， “讠”就叫言字旁。

多说汉语，看汉语video等，http://www.youku.com/

中国汉字大多数时候可以分解为声旁表声和形旁表意，比如 搬，有些是考形意结合，比如 闷，心关在门里，自然闷。当然最好还是多读中文的书有助于强化记忆。