What should I be doing now to get a good recommendation letter as a graduate student? I am currently doing a Master's degree in applied mathematics. I am worried though about after I complete my degree and I apply to another graduate school for an applied mathematics PhD program. While I have a good relationship with my supervisor an expect to get a good recommendation letter, most graduate schools and research award applications require three. 

My question is what should I be doing now to ensure that I can easily get good recommendation letters when I graduate?

Right now I spend most of my time doing research which by it's nature in my field is a solo activity in collaboration with my supervisor. The rest of my time is being a teaching assistant, and doing a few extra circulars. I want to start working on getting good recommendations while I still have time before I graduate.

More Personal Notes 


I am in my first year, started September 2017.
Things I do outside of research and being a teaching assistant include being part of my school's graduate society, and mentoring undergraduate students in the department.
One suggestion is to get a good teaching reference if you're working as a TA.  Most departments have one or more faculty who supervise graduate student TA's.  If you're actually leading a recitation section or teaching a class, you should ask this person if they would be willing to write a recommendation letter addressing your teaching and you should invite them to observe you in the classroom environment.  A good letter of this support together with good student evaluations will make a strong case for your ability as an instructor.