Many of us are somewhat proficient with professional graphics programs like Adobe Photoshop or CorelDRAW so using an online design tool might seem like a waste of time. But I have discovered a tool that, especially for marketing and social media, has become invaluable to me.
Snappa.com has been great for marketing and letting me get my message across in picture format. A Facebook header can be squeezed in lots of different ways, and Snappa accounted for all of them, helping me create a header that worked great on every platform. Snappa has templates for other social media apps as well, allowing me to move graphics between them easily and helping me create a clean, unified look across channels. On top of it, you can just make great graphics that you can use for your website and other needs.
