My memory is incredibly bad and I still managed to finish my studies :) Remembering important information about your work (e.g., critical papers) comes naturally. You will be talking about these things for three-four years - they will eventually stick. Having said that, in most of my meetings I had to go back to papers and notes to make sure I'm not making false claims, which only made me more careful and thorough. You don't have to memorise anything :)
I 100% agree with pm133 :)