Example 1: Avoid gratuitous/clever operator overloading. One needlessly weird GUI library had users write
w + c; to add a child control
c to a widget
w . (See Item 26.)
Example 2: Prefer using named variables, not temporaries, as constructor parameters. This avoids possible declaration ambiguities. It also often makes the purpose of your code clearer and thus is easier to maintain. It's also often safer (see Items 13 and 31).