Usual openings:
    5 card major (13 pts or better, except 3rd seated might bid on 11 or 12 pt hand with good spades)
    Convenient minor (13 pts or better, no 5 card major, bid longer of 2 minors)
    1 NT for 15-17 pts balanced hand, no singleton, no 5 card major, possible 5 card minor.
    2 NT for 21-22 pts balanced hand, no singleton, no 5 card major, possible 5 card minor.

Unusual openings:
    Strong 2 (20+ pts).  Forcing; rebid even if <6 pts.
    Weak 3 (8 or less, 7 card or better).  Probably no rebid unless you have 13+ pts and 3+ cards including honors in my suit.

Usual responses:
    simple raise by 1, same suit, 6-9 pts
    limit raise by 2, same suit, 10-12 pts
    change suit at 1 level 6+ pts
    change suit at 2 level 10+ pts
    jump shift 13+ pts

1 NT responses:
    3NT: if 10+ pts and fairly balanced hand with stoppers in majors/opp's bid suits.  Denies a 5 card major.
    2NT: exactly 9 pt hand, fairly balanced with stoppers in majors/opp's bid suits.  Denies a 5 card major.
    Jacobi transfer: 2D or 2H response to 1NT opening, says I want you to bid one suit higher, and I promise 5 card support and 8+ pts
    Stayman: 2C response to 1NT opening, weaker than Jacobi, says I promise 4 card support in 1 or both majors, and 6+ pts, you respond with 1H or 1S to suggest a 4 card major, or 1D to deny a 4 card major.

Overcalls:
    Simple overcall may be light, 8+ pts, 4 cards, suggesting a lead suit as well as a potential fit
    Jump overcall promises 13+ pts, 5 cards (opening strength)
    1NT overcall promises same as 1NT opener.
    May occasionally do weak jump overcall for 7+ card suit that I would normally open weak 3, especially if I am void or singleton in opponent's bid suit.

Other conventions:
    Blackwood - After a suit with a fit has been found, 4NT asking for aces.  5C for 0 or 4, 5D for 1, 5H for 2, 5S for 3.  5NT asking for kings, same convention.
    Gerber - Like Blackwood, but only used when No Trump is the preferred contract, so 4C following 3NT asks for aces, 4D=1, 4H=2, 4S=3, 4NT=0 or 4.  Then 5C asks for kings, same convention.  And perhaps 6C asks for queens to decide between small slam and grand slam.
    Takeout double - a first round double indicates, roughly "I'm fairly strong in every suit but what has been bid so far"