I had it as part of my deal - 2 hours per week with a grad student. However, we got to be friends and quickly fell into talking and not studying. Then I gave myself some 'bootcamps' where I hired teachers for up to 6 hours per day every day for a few weeks to give me a boost. And then I hired one of the Chinese teachers here who teaches foreign students Chinese to teach me for 2 hours twice a week. This worked well until May, when I got too busy and was away too much. Will start again after summer.