One of the easiest ways to promote a logo is to get it on a T-shirt and then let the T-shirts spread all around in the public. There are many corporations which have put their logos on T-shirts and have increased their brand awareness among the public. The success of these corporations only goes to show that just about any brand logo can be promoted using a T-shirt, if the campaign is done right. All you need to do is to come up with a good design that promotes your logo in a clever manner.
Any person would not stare at a T-shirt for more than a few seconds, so you need to make sure that you come up with a design that is able to capture the imagination of the viewers in those few seconds. It does sound like a stiff challenge, but if you are able to meet the challenge then you can surely get the job done in a short period of time. Once your logo has been printed onto a T-shirt, you will be able to notice that your logo can go viral provided that you organize your campaign well enough.