This last trick from Dave Chick is something I do a lot if I'm having a hard time making the bass and kick fit together in the mix.
In fact, there's an entire video on separating the kick and bass so that they move together in the mix inside the video vault of the Drum Mix
Toolkit.
If your bass and kick is clashing in the low-end and you need help cleaning that area of your mix up, check out the Drum Mix Toolkit here.