Yeah, I agree with all of those tips. I've been playing for 4-5 months now, and this thread has still taught me something. I guess that means that we're always leaning, no matter how experienced we are.
Anyways, beginners to the TDC should use all of these tips, and especially make sure to follow a strict routine when it comes to shooting torpedoes. If you need to be at 90 degrees at 500 meters, then do it all of the time... Then once you feel you have mastered these techniques, you'll probably be able to shoot with minimal help from the TDC... You'll be able to rely more on experience (i.e. educated guessing

).
I remember when I was a beginner, I had trouble with the Naval Academy torpedo mission. I couldn't even hit those cargo ships that were moving at 3kts. Shoot, I couldn't even hit the STATIONARY ship!!!
But now I have no problems hitting a zig-zagging ship in heavy fog. That is what experience can do for ya...