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 Acol Bidding page for some suggestions.
Acol Opening - Unbalanced Hand
Bid you longest suit.
With suits of equal length:
5 card or longer suits bid the highest first
4 card suits bid the lowest first.
If you are using the Gerber convention for asking for aces and you have a biddable club suit, bid clubs first (this is a bit of a fudge in the program but does solve a lot of real problems when using Gerber in the real world).