TIP-- DIG UNLIKELY TARGETS:

Be sure to dig targets that come up as "trash". I should do this more. This is especially important if the place you are hunting is one that you frequent. If you clear the area, next time you will be able to find the real targets. Also don't forget that some of those "trash targets" might be good finds like rings and tokens.  I know it's hard to do when all you find is pull tabs and bottle caps but it could be worth it in the long run.