Here's the plot. If you could send one message back through time to your younger self, what would it be and would your younger self listen?
A few (two and a half) years ago I would have answered this question quite differently from how I'm going to answer it now.
Here's the resolution. I would ask my younger self to work a lot harder than he (I) will (did) during the first semester at Wisconsin and to switch from signal processing to image processing even earlier. How would I convince my younger self? Put something in the message which he (I) would recognize as something only I (he) know and would never possibly reveal to someone else even under torture.
Here's the twist. How will I answer this question in the future?
Everyone writes (reads) their own novel.