Sacrificing. Be bold when non-vulnerable
Intelligent bids made in the knowledge that you might fail to make the contract
1. Support for partner's Major, esp. when weak
It's better to go down a bit than to let the opponents make a game/big score. So if you have
- weak support (<11pts), but
- a 5-card suit, and
- a singleton...
...go straight for Game. You're going to make, or save.
Any penalty points will be less than the points the enemy will be awarded for making the contact are likely to bid.