Opening Do's and Don'ts

Do:

Develop your pieces -- get them all out quickly

Control the centre -- get at least one pawn in the centre and point your pieces there

King's-side Castle -- to get your King safe

Think about opening a file for your Rooks

Don't:

Move pieces twice without good reason

Move your Queen out early (because you will have to move it again when it gets attacked)

Make lots of pawn moves (develop a piece instead)