As a full time, type-B college student who also works, it varies. I shoot for an hour a day, somedays I get there, some days I don't. I mainly make it a focal point to keep my brain sharp, whether that means doing a few questions a day or one passage, I make sure to put forth at least some effort each day. I started at 150 in September, now I'm at around 157-160 on PTs. Don't overwhelm yourself and listen to your body! You got it!