From lingomi:

If you’re like most Chinese learners, you probably make tone mistakes now and again. I know I’ve made plenty. Sadly, most Chinese textbooks don’t have a section on how to get better tones (kind of odd, if you think about it). Once, when I was preparing for a televised debate in Chinese (a story for another day), a teacher mentioned I was having issues with my 4th tone. Then she told me the 20 words I needed to practice to dramatically improve my tones. That’s right, you can get better tones by spending 5 minutes a day practicing 20 words. Continue reading →