Jazz chord progression

Here's a trick I learned yesterday from my piano teacher. Some of you may already know this, but I doubt that all do.
You want to progress/lead to a minor chord, by using a colorful chord progression. Here's what you can do to lead to a minor chord:



We will create a chord progression leading to a C minor.
First, you must find the minor chord's dominant (a perfect fifth above the chord's tonic), in this case G. Now, you build the dominant with augmented fifth and ninth, in our example a G, B, D#, A#. This is the first chord.
The next chord will be the same, except the bass note will be changed to G's tritonus, a C#. This will be the second chord.
And then, you insert your minor chord. That's your progression, it sounds quite cool. Feel free to diminish or augment additional tones in the chords to create your desired effect.

I'm crazy about this kind of stuff. I'm a jazz guitarist, so I love playing around with chord progressions and voice leading, while reharmonizing and rearranging a tune.

I sort of liked going to the I min/maj7 from that, rather than the straight minor - kept the voices moving and all.