In a pinch it's possible to cram from the lecture notes (god knows i've done it hehe).
But from personal experience...
Macro/Micro = Learnable from the textbook. Don't bother with truong truong.
Accounting = should go to the lectures. Easiest way to learn it. The textbook is sometimes hard to learn from
Finance = go to tutes/lecture notes. Lectures so-so.
Maths - HAVE TO GO. YOU HAVE TO GO.
ACTL 1001 - Tutes are great, i'd rather go to two tutes a week, then go to the lectures. Ended up going to about 1 in 2 lectures. The text is great though
Of course, it's recommended that you attend everything!