I have heard/read variously that 10-15 seconds in the microwave will make the lemon or lime give more juice. Also that rolling it on the counter with pressure will break up the little cells and allow it to give more juice. I do both.
However, if the fruit is dry inside, it doesn't much matter what you do.
If you buy a bag of limes, you're bound to get a dud or two.
Pet Peeve: This is why a recipe measurement such as "juice of a lime" is imprecise.
"If you want to make an apple pie from scratch, you must first create the universe." -Carl Sagan