The main thing I learned, you have to stay one step ahead of the game at all times. Before take off have every navaid and frequency you can tuned. After you get past one navaid, tune and identify the next. Write down every frequency and clearance. When you are preparing for the approach, prepare for the missed too. Need to twist the OBS when turning in a hold on a VOR radial, then twist again when you turn again.
W O W
I drank from the fire hose but I didn't choke. I wouldn't have passed a checkride by any stretch, but I didn't "kill" myself either. I got there, did the approach, executed the missed approach and the hold. Had a couple missteps along the way of course, but in the end I got a "great" from my CFI and a great learning experience too.