Elementary patterns to use in writing client code that requires constructing and using objects.

Declare-Construct-Initialize (maybe this should be "Declare-Construct-Initialize-Use" or "Well-Defined Variable")
Read the Interface for Constructors (maybe this should be part of a "Constructor Specification" pattern, along with information on writing constructors)
Read the Interface for Methods (maybe this should be part of a "Method Specification" pattern, along with information on writing methods)

The following related patterns are defined elsewhere. Better references/links will appear in time.

Simply Understood Code (Gabriel)
Intention Revealing Name (Beck)
Locals (Only) When Needed (Bergin)
Initialize (Bergin)
Consistent Capitalization (Bergin)
Consistent Naming (Bergin)
Name Your Constants (Bergin)
Say It Once (Bergin)
Say "this" (Bergin)
Don't Repeat Code
Init Immediately
As Local As Possible