Another common modulation technique is where you have a II V progression which does not progress to I , but in the next bar, the V 7 chord becomes II min7 of the next key. In this case, all you have to do is lower the 3rd of the chord by a semitone to change from a dominant 7th to a minor 7th. Here is an example.
Here is a whole song form making use of short II V progressions moving through several different keys. It is based on the chord progression from Duke Ellington’s "Satin Doll". Learn it as written and then try substituting some of the chords.