Log cleans are miserable, haha. Something that I did that helped was to set-up a conditioning drill like this.
Take about 70-80% of your best log clean.
Do 3 cleans every minute, on the minute for 10 minutes.
This will gas you pretty fierce, and will really help develop some technique, ESPECIALLY under a state of fatigue, which is where you'll really need to be good on the clean.
I originally stole the idea from a Brian Shaw article in Power Magazine. Strongmanvinny did something similar too for his log clean. This approach helped me take second place in a clean each rep event, which was amazing considering I was competing up a weight class and training with a totally ghetto log, haha.