Recommending Myself?

Writing a letter of recommendation was harder than I thought it would be. Looking back at all the work I did in this course made it difficult to choose the best highlighting points of my accomplishments. It was hard for me to find the right words to express my worth, and I still don't think it's ready to be sent out to future employers just yet. I still need to put a lot of work into finding the right balance of self appraisal such that future employers know my worth, but that I don't sound too haughty of myself. I do believe, however, that my thoughts as to how our professor sees me. I believe that she would be very proud of me and my work and how far I have come in her class.