Smashing magazine have a post which will help designers to save lot of time while they are on their work.

From the website

Want to save some time? Of course you do! You are probably always looking for ways to do this faster and make that easier, it’s human nature! One of the best ways to save time is experience. The more experience you have, the more comfortable you are working, the more you have developed your own best methods, and with experience you know how to better avoid mistakes and disasters. So always stay hard at what you do and you will definitely save more than “just” time!

However, regardless of your experience level, there are ways to speed up the common design tasks. You should find some of these not-so-well-known tips and strategies listed below very helpful for your workflow. And please feel free to suggest more ideas in the comments to this post!

This is a really must read article, have a look here