Dear XX,
I haven't met you for a long time,how is everything going with you,especially in your study?
I think I can give you some suggestions about your English learning.Firstly,you should read loudly some passages everyday so as to develop your language feeling.Secondly,you should do proper amount of exercises.Finally,you should listen such English radio as BBC from time to time.I hope you will make great progress in your study.
yours,XX