From time to time I like to offer places of inspiration such as this. Adobe Exchange is a great place to gain Ideas and inspiration about graphic design and possible marketing ideas for your business.
They offer a ton of free brushes, actions, and design elements as well as some more intricate ones that require purchase. Sometimes the site can be slow to load but it is worth the effort.
Make sure you know all of the copyright and right usage for anything you download. Some items can be used for personal use and not commercial use. If you have any question it is best to contact the supplier of the tool.
I always like to take items from Adobe Exchange, and make them my own. Change them and improve them to be unique to you. If everyone used the same brush the same way, then everything would look the same. So I hope you found this link usefull and have fun with your design.