Sharp tools,helps a bunch,If you use antler,then they need to stay dry. Humidity is rough on them.
Sometimes ,when things aren't going well,put the tools down and take a break.(no pun).I always knapp my best after a time away from it.
When doing percussion work, rest your arm on your leg,this helps with control,and keeps you from pulling the material away as you swing.
I'm sure Billet Head and Ralph will be along tomorrow to help out with some more important stuff!