Developing reliable finger technique also requires training the eyes, breath, and brain! Make sure that you have played a passage correctly from the outset. Go slow enough at first to notice all details: dynamics and articulation as well. Allegro should become adagio at this stage. Make sure your eyes are reading slightly ahead: look at the notes about to arrive, not only just right where you are. Sometimes your brain can 'trick' you into stopping if you are low on breath, because that realization that stopping=breathing has been ingrained for years! Mark your breathing spots, and stick to the plan. Now to fingers alone: Slow practice is helpful, but try breaking up passages into two note units, at a very fast tempo. Link them together into longer units as you get more secure. Try different groupings of notes (starting a 16th note passage on the 'and' of the beat and grouping in 4's for example). Move your metronome up a notch, down two notches, then up three, down two, for a new way of moving forward in tempo. Above all, consistent practice cures fingering glitches. Happy New Year...happy practicing!