Two most important signals 1. On Partner's opening lead 2. When you or partner make your FIRST discard - When you don't follow suit for the first time. I recommend playing attitude on both of those discards. (Encourage or Discourage, so either low encourage or high encourage, whichever you and your partner prefer).
The most important signals
Double or bid?
Bid as high as possible!
Defending against a multi 2♦
Transfer or not?
Nv compete
How strong vulnerable?
Preempt suit quality
6322 and 7222
2♣ opening
Doubleton lead
Passive lead
When to lead active
1N with 5422
Takeout double
Negative double
Splinters
Competing partscore
Try not double
Ace Ace King
2 level overcall
Lead Trumps #1
Lead Trumps #2
7 card GOOD suit
To open or not, pre-empt or not
Let the opponents play when they are misfitting
The strongest hand
Be practical