Did you know that there is a trick to slicing limes? If you want wedges for squeezing and you cut them the wrong way you won't get as much juice out of the lime. Start by holding the lime standing up, stem side down and point sticking up.
Slice away! Seriously, you really will get more juice out of your lime slicing it this way. Some bartenders insist you slice the lime and discard the "core". I've tried slicing limes with and without the "core" or center and haven't noticed a difference.
Side note, when choosing limes, a green grocer told me that the thinner skinned limes are much easier to juice. I've followed his advice and I've gotten juicy limes every time!