Reading pianopractice.org has really helped me focus on what's important. Today I've worked on Le Matin more and now have the first 32 bars memorised. Instead of moving on to bar 33+ (which is much harder) I've focused on the tempo, who I press the keys and release them and the pedalling. A lot of repetition, but it pays off.
The next 20 bars are tough and of I was following the advice of Piano Practice then I'd have started at bar 33 (start with the hard stuff), but I didn't when I first picked up this piece, so it is what it is.
Practice time: 1.5 hours