I've been learning English for many years now by using many resources available to me. It is mostly reading, as I have very few opportunities to use English to communicate. Due to this fact, my vocabulary is rather one-sided: I can read fast and without problems, but I have difficultly finding the proper word in real conversation. My live expressions are full of book-learned words and phrases. I guess I often use formal and archaic words instead of simple spoken ones. I simply don't feel the difference between them as a native speaker does.
Are there any online resources that could help find out the most appropriate words for the contemporary usage, helping to sound less artificial, formal and archaic? Or, maybe, other advices for the learners like me?