Source: Eddie Kantar Teaches Modern Bridge Defense
1) You are West. Select a lead from each of the following hands, against this auction:
2) You’re still West but this time the bidding has gone:
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Test yourself solutions
1) You are West. Select a lead from each of the following hands, against this auction:
Problem 1
a) 
9 Showing zero or 2 higher honors, one of which must be the 10. Partner assumes two higher honors if the 10 is not visible. Also, lead an unbid major rather than unbid minor in close situations.
b) 
10 Showing zero or two higher honors, one of which must be the jack. Partner assumes two higher If the jack is not visible or the 9 is.
c) J A no-brainer. It is rare not to lead the top of a four-card honor sequence.
d) 10 Your clubs are so much better than your spades that you should break the rule of ‘major rather than minor’. However, to break the rule you should have three honors in your minor suit.
e) 
J Again a sequence lead is better than leading from a broken four-card suit.
f) 
J A safe lead. You can’t expect to find much, if any, strength in partner’s hand. Let declarer take all those finesses into your hand. Is he ever going to be surprised when they all lose.
2) You’re still West but this time the bidding has gone:
Problem 2
a) Q Even though they have bid hearts, top of a four-card honor sequence Isn’t exactly chopped liver.
b) 6 The normal lead is the Q, but when they’ve bid a suit and you have a three-card sequence, it pays to lead low. You don’t want to block the suit if partner has Ax, Kx or 9x.
c) 3 Better to lead from a suit that has two honor cards than a suit that only has one.
d) 3 Partner is marked with a strong hand so try to find her likely long suit. It doesn’t figure to be spades (no 1* over-call), but it might be diamonds.
e) J Even though you have a four-card major and a four-card minor, an honor sequence in a minor takes precedence over a broken four-card major.
f) A Another no-brainer. The lead of the ace asks partner to unblock the missing honor. If he can’t do that, partner gives count.