I'm already working on the LSATs. This is more about getting useful work experience for the next 18 months, not really the application. I don't want to continue with my current job if there's something I can do that will help me when I'm a lawyer later on.
Work experience is going to be more helpful for you for getting jobs, I think
I think anything that has some responsibility and substance is good though.
If you want to be a litigator, work experience matters less. If you want deals or business, then you want work where you worked for a respected business, or substantially interacted with clients. For sub-specialties it helps to have worked in the industry a lot (eg. entertainment industry for OMM CC, big accounting for Ivins/Caplin Drysdale).