I came across this .pdf guide for the proper and improper use of tools. I thought others may find it useful. We don’t use all these tools in fossil collecting, but some sections seem pertinent, specifically the section on hammers. There is also advice about crowbars, chisels, screwdrivers, and punches, which find their way into my collecting gear from time to time. This is one companies take on how to properly use their tools (and keep them out of trouble), so your mileage may vary, but it seems a good general document on the dos and don’ts of tool use.
https://www.ampcosafetytools.com/wp-content/uploads/2015/08/chart.pdf
ToolUse.pdf