Here's a great time-saving tip and way to show off the power of Android all in one -- use a widget to dial contacts directly from your homescreen. Widgets are one of the most powerful and customizable parts of Android, but most people relegate them to simply displaying weather or offering music playback toggles. With Simple Dialer Widget, you can put that homescreen space to good use by having a fully functioning phone dialer front and center on the phone.
The dialer works just as the proper dialer does, with a full call log and favorites list (although some of us are having issues with favorites) accessible with tabs on the widget. There's a crazy amount of customization available when you make the widget -- from colors to date format and text sizes -- as well as the ability to resize it to your liking. It also works on the lockscreen of devices running Android 4.2, which is a nice plus.
Interested in taking a look? Head to the Google Play Store link at the top of this post to grab a download of Simple Dialer Widget -- it's free and certainly worth a try.