How's Vacation and Down Time?

Taking allotted breaks is important, but frankly let's face it, there are times when a break is rare. But downtime is necessary to retain sanity, and frankly, your health. What types of strategies do you use on the job to ensure you get enough rest to offer the best care you can? Does your job have a maximum amount of hours and shifts you can work consecutively? What is your vacation time and do you take it? I know most of the nurses I know can't wait to take their holidays, so that doesn't seem to be a problem :P