The two "secret" weapons to enhance your input fields are the placeholder text & its type.⠀
1. Leverage the placeholder text to guide users instead of just repeating the label. ⠀
2. Limit the wrong input source (eg add country code) by using predefined values for common inputs.⠀
Make it as simple as possible for users to enter their information.⠀
Choosing the right UI element plays a huge part in upgrading UX.⠀
For example, use a number picker for integer numeric values instead of a generic text field.
In eCommerce carts, most users will buy 1, or 2 items maximum. The -/+ buttons make their input process quicker.