User Interface (UI) Design Principles
User Interface Design patterns are recurring solutions that solve common design problems. Let's start with the fundamentals of user interface design. Constantine and Lockwood describe a collection of principles for improving the quality of your user interface design. These principles are
The structure principle: Design should organize the user interface purposefully, in meaningful and useful way. based on clear, consistent models so that they are apparent and can be recognized by users. Putting related things together and separating unrelated things, differentiating dissimilar things, and making similar things resemble one another. The structure principle is concerned with overall user interface architecture.
The simplicity principle: the design should make simple, common tasks easy. communicating clearly and simply in the user’s own language, and providing good shortcuts that are meaningfully related to longer procedures. 
The visibility principle: the design should make all needed options and materials for a given task visible. without distracting the user with redundant information.  Good designs do not overwhelm users with unneeded information.
The feedback principle: the design should keep users informed of actions or interpretations, changes of state or conditions and errors or exceptions that are relevant to the user trough clear, concise, and unambiguous language familiar to user
The tolerance principle: the design should be flexible and tolerant, reducing the cost of mistakes and misuse by allowing undoing and redoing, while also preventing errors wherever possible by tolerating varied inputs (misspellings) and sequences (order or words in article titles) by interpreting all reasonable action (analytic data collected from user previous visits). This principle also states that each aspect of your design should inform the user that something needs to be done to fix the issue and be able to help by offering recommendations.
The reuse principle: the design should reuse internal and external components and behaviors, maintaining consistency with purpose rather than merely arbitrary consistency, thus reducing the need for users to rethink and remember.

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