I have a general question about applying to PhD programs. I am in my third year as an applied math major and i'm planning to get a PhD. I've taken all the the minimum classes like Calc, Linear Algebra, etc. except for real analysis which i will be taking next year. My question is what other things can i do to signal my interest into getting into grad school. I have been trying to ask around for research but no one has really responded so maybe i'll my luck this quarter but what other things are a must for good signaling? Should i take real analysis and graduate econometrics in my 4th year? Would grad schools still take that into consideration considering they take the sophomore and junior year grades?