These Help pages can be downloaded here with the Winning Bridge Shareware game for Microsoft Windows 98, ME, 2000 and XP.
If you would rather read a book, take a look at the Help Index page for some suggestions.
Finding the Contract
Agreeing a Suit
Losing Trick Count
Finding a Slam
When in Doubt
Bidding can go wrong for several reasons, for example:
no suit can be agreed
a bid has been misunderstood
a wrong bid has been made
the opposition have interfered.
If you think things are going wrong it can be better to stop the bidding at a low level rather than trying to find a suit fit.