Anziehen, ausziehen, umziehen, aufziehen are 'trennbare Verben'. This means that in some situations you will have to put Präfix at the end of a sentence. For example, ich ziehe mich gerade um. = I'm just changing my clothes. You should see what kind of Präfix a word has and then you can guess its meaning. Here http://www.dartmouth.edu/~deutsch/Grammatik/Wortbildung/Separables.html , you can find some of them.

hi, you can also group related words together and built a story to memorize them. e.g. Zum umziehen must du dich ausziehen und wieder anziehen. (to change you must undress and then dress again) this gives you a context and the relationship between the words.