To create your own Flat UI pack, the first step is to define which elements you should create. Your objective is to create and gather a pack of elements to reuse in future projects, so you should look for basic interface elements that are common to most projects. Elements such as buttons, form controls such as radio buttons and checkboxes, form content areas such as text fields and text areas, title style, and sizes such as <h1>, <h2>, and <h3>, once designed, thought of, and developed, can be reused in several projects. Often, a web designer finds himself or herself reusing old HTML and CSS code, so creating your own personal pack is great in order to make your workflow easier and quicker.

The first phase of creating your own Flat UI pack is to design your elements. There are several designs online for UI packs, web elements, and even great icon packs that you can use as an inspiration for your own work. A simple search on dribbble.com will help...