There are things that can save work and one of these graphics are commonly used in PSD format, ready to edit colors and shapes.
In 2ExpertsDesign have collected more than 500 elements arranged in various sets directed above all things, the design elements. These may find buttons, calendars, web icons, banners, form fields, sliders, etc … all free.

Link | 500+ Free Download High Quality Photoshop PSD Files For Designers