How to handle a long suit when the partner has a void...
1) When you hold a long suit with intermediate cards, try to capture one of the opponents' honors...figuring out where it could be in best position...
Example : You are playing a ♠ contract. You hold 8 ♠ cards : KQ10... You can't afford to lose more than one ♠ trick.
How to handle a long suit when the partner has a void......
2) But, when you don't have intermediate cards, do your best in order to avoid having your "small" honor captured by the opponent. Take a chance... sometimes it's worth it !
Example You are playing a ♥ contract. You have 6 ♥ cards, AceKJ...dummy has none ! You can't afford to lose more than one ♥ trick.