Proximity
The principle of proximity states that things that are close together appear to be more related than things that are spaced farther apart.

Alignment
Alignment helps ensure consistency and cohesion in the visual design. An example of this can be seen in the alignment of the tabs below.

Similarity
The principle of similarity states that when things appear to be similar to each other, we group them together. And we also tend to think they have the same function. An example of this can in Apple’s website which uses the principle of similarity in its products listings.

Good font pairing
It is important to ensure that you are choosing fonts that promote contrast while minimizing conflict. A good example of this can be seen in the below.

Good Color Palette used
Designers can use color to highlight certain things and make others fade in the background. A good color palette can help differentiate and connect certain elements of the design. A good example can be seen below:

Identify the grid (take a screenshot and find the grid)
Working with a grid introduces a systematic order to the layout, helping users distinguish between different types of information. This helps improve clarity, efficiency, economy and continuity as can be seen in the example below.

