First of all, thanx for the very warm welcome and the quick and interesting replies to my topic!!! It's a good sensation to be surrounded by many "piano fans" like you!
Greetings.
It depends on what kind of pieces or technique you are having trouble on. Post the pieces that you are working on. As for the stoppings, it may be because you arent using the wrist enough, or the incorrect hand postitions, or maybe just that the notes aren't secured. Post the specific pieces and the place where you have trouble on. Hope this helps. 
Mmmm... let me see...
TECHNIQUE
Used to try with Hanon, but now I use it only for warm-up. To practise ice-cold technique, better return to the simplest and boring Schmitt's opus 16 exercises: at least I can control if the single movements are correct!
Studies are a thorn in my side. I found Czerny always very hard. Better with Duvernoy. But I do very little studies at this moment. Maybe is this THE error?
Scales 2 octaves parallel motion, at around 128 bpm, more or less depending on the difficulty. Arpeggios even 2 octaves, but quite slow and always HS, for the moment.
PIECES
- 23 Bach easy pieces' anthology (many Little Preludes, for example)
- Mozart famous "Easy" Sonata in C maj
- Haydn: Sonata in E maj and (attributed to Haydn) A maj
- Bach's 2-parts inventions no. 1 (C maj), 3 (D maj) and 4 (D min)
- a couple of easy pieces by Italian harpsichordists
Till now, technically only working with the fingers.
Lorenzo