Want to get back in touch with professor so he won't forget me but don't know what to say I want to get back in touch with professor so he won't forget me but don't know what to say! I took a class with him, but that's about it. I would like to keep in touch, so that he will remember me in the future but it's already been a few months, I just have no idea what to say, as I do not have anything to say really (Haven't been able to catch up with any research or so due to work). Any advice?
I enjoy it when former students let me know what they are working on and how what they learned in my course is assisting them in their career. 

I would suggest an email sharing this information and thanking the professor for teaching such a useful course.