I completed yesterday (December 21st) one of my goals for this year. I practiced each one of the MJER Shoden waza and Batto Ho waza 150 times - that is home practice and dos not include class practice. I also practiced Yoshukai Iai - the whole set - 120 times. The long term goal is to practice each waza 1000 times.
Katachi cannot be practiced solo, so far we are up to 350 times Ukenagashi Sono Ni, both parts. I certainly cannot say our execution is perfect, but it has improved a lot. When we first started, we would, maybe, get one acceptable waza each 20 or 30 repetition. Now there are times when I can perform properly 3 or 4 times in a row.
How do I know they are good ? That's a good question. It feels good, it seems that the timing is good, the distance is good, the opponent's boken slides effortlessly on mine. Notice that I did not say it was perfect ! I am sure there will be things to improve, which I am not able to figure out by myself, and this is what seminars are about.
One thing I know is that our practice has improved, and that this is the only way to progress.
I practice 4 or 5 mornings per week - MJER Iai, Yoshukai Iai, then Zen, the whole thing takes about 1 1/2 hours. Some days I have to shorten it.
We practice Katachi in class, usually Tuesday night for we have a 3 hours class. We only account for sets of 10. If you practice 3 times a waza, you don't really have the opportunity to improve it, so it does not count. We do 2 to 5 sets, each opponent does both Uchidachi and Shidachi part. It takes a while, but it is worth it.
Practicing each waza 1000 times will take years, but we have time ! In 2014 I want to complete 150 of each Chuden and Okuden waza; for katachi: 1000 Ukenagashi Sono Ni - then we will switch to an other one, possibly Shinmyoken.
What are your goals ?