I am applying for a scholarship which requires a letter of recommendation. I asked my research mentor (who is extremely busy right now) since he's the only person who knows me beyond my ID number or test scores. He is also one of the nicest professors I have ever met. In any case, I e-mailed him my request and he replied asking me to help him out by writing the letter myself. He said he would write some words and we would combine our letters into one. I have heard of this being done, but I'm completely lost on how to go about writing a letter about myself. Any tips? Is this a common practice - i.e. does it mean anything good/bad? Any help would be appreciated!