If the topic is (or code coverage): Please make sure that you and your counterpart understand the same measure by the same term.

If you use a tool to determine software coverage: Please check how the tool handles the two cases of doubt given in misapprehension 4.

Please keep an eye on the effort you need to reach e.g. 100% MC/DC: Is it in the right relation to the gain in relevance? Sometimes it may be better to spend this effort for other test activities!

Beware of fool’s gold: Don’t relax because you have reached 100%!