It doesn't matter which higher note you use, because it's too short to tell the pitch. For this reason, it is unnecessary to use the formal fingering for the upper note, just momentarily lifting any finger produces a satisfactory cut. A cut that starts with the grace note can be effective too, especially to emphasise a high note beginning a phrase. Cuts are useful to break up notes of the same pitch and to give emphasis and life to the tune. Rolls are the next ornament and consist of the note itself, a cut to a higher note, return to the note, a tip to the note below and a final return to the note.
Real flamboyance comes from combining a roll with an additional cut - again all on one breath.
A cran consists of alternating the note in question with several higher ones. Breathing There is a great temptation, especially among music notation readers, to breathe only at the end of parts of the tune. This usually means that a lot of the tune is played weakly for want of air, that breaths are long and loud and that parts of the tune get lost. Experienced players find smart places to breathe often, and turn the pauses for breath into punctuation. Smart places include long notes, which might otherwise be rolled.