►From Richard Banbury
1. Vulnerability : Look at this before you look at your cards.  Make it part of your routine on every hand. (It's one of the most important things in a competitive auction). No dodgy overcalls when you are vulnerable !!

2. No-Trump contracts are all about your combined high card points.  If not sure about inviting - or accepting an invite - to game, then don't! Avoid bidding on "in hope" or "just in case"

3. Trump contracts are all about trump fit & distribution (a good side suit or a singleton).  Points are a poor guide. An extra Jack won't often make a difference! Don't be shy when you have a good fit for your partner's suit and a shapely hand. 

►From Hilary Stewart
1. Plan your rebid: If you open the bidding with one of a suit PLAN your rebid BEFORE you open.  Your plan may change though:
    a) if a major suit fit is found or b) if partner makes a limit bid in your suit or in no trumps and you definitely don't have enough points for game

2. Be A SWOT: As declarer, on every hand, PLAN your play BEFORE you play from dummy to the first trick.  Analyse the opposition bidding (including any initial passes), and the opening lead (what does it tell you about the defender's holding in the suit led?).  Then Strengths (how many top winners?), Weaknesses (how many extra tricks do you need for your contract?), Opportunities (examine each suit combination you hold for ways of generating extra tricks) and finally Threats (your analysis of the  opening lead may give an indication of a possible danger).