Designing a navigation header for a corporate communication site

Start by creating a new file of header size. Fill background with a solid color.

Using pen tool create a shape as shown below.
Double click the layer to open layer style window. Apply settings as shown.

Create a rounded rectangle using rounded rectangle shape tool. Apply a black to white gradient in gradient overlay layer style. From layer menu select layer style>>create layers. Select and merge both the resulting layers. Change layer mode to screen and reduce the opacity.
Create a rounded rectangle using rounded rectangle shape tool.

Double click the layer to open layer style window. Apply settings as shown.

Similarly create more buttons with different colors.

Create a rectangle using rectangular shape tool. Apply a nice gradient overlay.
Insert a relevant cutout and place as shown below. Apply some outer glow to it. Populate the header with navigation links, company logo, search bar and other text details.