Another thing you can do is to take a look at the classic "gypsy trill", notated below (I just ran into this for the umpteenth time while transcribing Stephane Grapelli's performance of Nuages from my favorite Django CD, ....):

This is so characteristic of both Django's and Stephane's playing that I thought I'd analyze it further.

First of all, a great type of chord progression to use this on would be a gypsy-type version of that old standard, "Bei Mir Bist Du Schein". This song is, in it's simplest form, a 3-chord song consisting of just Am, Dm and E7. However, we'll jazz it up by substituting a progression involving m6 chords for the Am, and adding an F7 at the end of the form just to spruce up the turnaround. Here's how the chords go in the A section:

| Am6 Bm6 | C6 Bm6 | Am6 Bm6 | C6 Bm6 |

| E7 | E7 | Am |  F7 E7 |

Try improvising over that, starting each phrase with a trill beginning on any note. Which notes work the best? (my favorites are E, A and C in that order - the notes of the root chord). In most gypsy pieces, there is a jump up after the ornament. Try something like: