Hi,
I started tutoring while an undergraduate at the University of Massachusetts at Lowell (in the 'Centers for Learning'). At the time I was an electrical engineering student so tutoring calculus (I,II, and III) and physics was not only a 'job' but helpful for me in my studies. I enjoyed tutoring more than I had anticipated and I made several life-long friends in the process.
After graduation I worked full-time while pursuing a master's degree in electrical engineering. Most of my coursework was very math-intensive so, although I was not tutoring at the time, I retained my math skills.
Upon completion of my MSEE, I decided to return to academics full-time in pursuit of a Ph.D. in biomedical engineering at Worcester Polytechnic Institute (WPI). My research focus at WPI was magnetic resonance imaging (MRI). MRI science is very physics, mathematics, and electrical engineering based (and chemistry as well....this is why I love MRI; it involves many of the physical sciences).
During my time at WPI I assisted several students in the basics of MRI and the 'how-to' of operating a MRI machine. This experience kept my teaching skills fine-tuned.
Presently I am a postdoctoral fellow at Harvard Medical School. I continue to work with MRI (and MRS) science and hope to continue to do so into the distant future. To supplement my postdoctoral salary I thought of getting a part-time job; my first thought was math and physics (or software such as MATLAB, IDL, or C) tutoring.
Personally, I'm an easy-going person who is patient with students and will not consider any question as 'stupid' (I was frequently afraid of asking teachers questions because I thought the answers would be obvious to others...only to have someone else ask about the same thing...). I hope I'm able to help you out!
Cheers
-Dave