Don't feed processed or seasoned meats such as: Ham, lunch meat, sausage, too much ground meat, etc. Also special care needs to be taken with salmon and some fish. I am not sure what exactly...other people on here can help you with that one.
And then of course meat with large weight bearing bones (mostly beef), and odd shaped bones such as T-bones should be avoided. The weight bearing bones can break teeth, and the odd shaped bones can be chewed down into odd shapes that can potentially cause obstructions if swallowed.