In competitive auctions, don't push slam - let your default be to keep it low, don't stress if you miss a slam. Just avoid -50!
The mentality for about 80-90% of slams is a discussion with partner, its not a random punt. If you don't have room to discuss and you need to, don't go. There are the occasional hands which, even if partner has a very disappointing hand, will be fine in slam. But don't be overly optimistic and hope partner has an amazing hand.
In competitive auctions, don't fall into the trap of going -50 by bidding too high.
For example
Here you could have slam on. Partner could have a singleton diamond, the Ace of clubs, King of spades, and you will claim immediately - thats only 7 points. However, if you have 2 diamond losers and a club loser, you are not safe on the 5 level. As it happens, that was the case
Partner had a full 10 high card points for his raise, yet you have 3 top losers. Don't go -50!
Be slow going to slam, especially in competition - don't gamble.
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
Losing trick count bidding
Favourable vulnerability
Be a nuisance
Big trump fits
What does 3♥ show?
Mental game
6+ card suits
Use puppet stayman more
Don't push slam in competition
The unusual 2♠ bid
Intermediate jumps
Conventions
Choice of equal cards
Don't false card
Never preempt with 11 points