Chinese-Tools.com offers free online lessons in Chinese. You can listen to native speakers and learn to read and write Chinese symbols. To learn spoken Chinese, you can learn the Pinyin alphabet, the official transcription of Mandarin Chinese. This allows you to learn more quickly because you can read pronunciations in the Latin alphabet.
You can watch Mandarin Chinese language learning videos on YouTube. Just search for "Learn Mandarin." Videos often show words being spoken, both in the Pinyin alphabet and in Chinese symbols. To hear or see the words being spoken again, simply replay the video. Repeating words often will help you learn more effectively.
Join an online language exchange like My Language Exchange. You'll meet Chinese speakers interested in learning English. Feel free to ask your conversation partner questions about Chinese grammar or vocabulary. Talking with your partner or exchanging emails regularly will improve your conversational and written Chinese.
Hire a Chinese tutor on the Internet, such as those on Chinese Hour. Joining a small class, buying a self-taught course or hiring a personal tutor call all help you progress in learning Mandarin Chinese.