If you are dependent, then only take enough to keep you from getting sick most days, and then once or twice a week take enough to get high. You are better off tapering down and then stopping,, at least to break your dependence.
I have found that using 2x a week (not consecutive days though) should keep your tolerance level. Using once a week will help it go down a little, and using 3x a week and more will cause your tolerance to rise.
The main mistake that people make when taking a tolerance break is that they will go back to using just as often as they were before the break. Taking a break will only help your tolerance for the first couple of highs if you are using daily, which is why I suggest taking a break followed by only using 2x a week max. It's also good to take longer breaks than that to help lower your tolerance more if you feel it creeping back up.
Of course this is all easier said than done, but it's the only way that you can use regularly without your tolerance getting out of hand. It will be a lot easier if you taper and detox to break physical dependence if you have one.