![Mad :x](./images/smilies/icon_mad.gif)
But seriously, think the law of averages. If you are good for 5 days and only bad 2, you will come out ahead. Really I've found that just keeping the *number* of S-days under control is most important.... this is especially true around holiday times and such (e.g., make Thanksgiving Thursday an S day, but not the Friday after, etc.)
Get your habits down first, such that the non-S days become routine and not that painful. Then if you still feel it necessary, you can work on getting the S-days under control.
There's my two cents, plus taxes and inflation.