I've implemented many of the recommendations in the book, "Guerrilla Marketing for Free: Dozens of No-Cost Tactics to Promote Your Business and Energize Your Profits" by Jay Conrad Levinson, and they've been very effective.

The product description on Amazon states:

"The guru of the Guerrilla Marketing series, with over a million copies in print, teaches entrepreneurs how to market aggressively without spending one cent.

Levinson, the authority on big-business marketing on a small-business budget, takes this concept one step further by offering scores of marketing ideas that are completely free. He proves that aggressive marketing doesn't have to be expensive if you use creative and unconventional means.

* Hold a giveaway contest. You'll attract customers and acquire names for your mailing list.

* Give free talks, consultations, and demonstrations. You'll establish yourself as an expert and publicize your business at the same time.

* Post on websites, bulletin boards, and other online communities. They offer countless opportunities for spreading your business message.

* Feed your clients. Sending cookies or offering free refreshments in your store can set you apart from the competition.

Levinson offers dozens of other tips -- some straightforward, many surprising -- in a unique, indispensable guide that proves you don't have to pay top dollar to improve your bottom line."

The term guerrilla marketing refers to the concept of unconventional way of promoting a brand. This way refers to get maximum outputs from limited resources. The ways used in guerrilla marketing include the street giveaways of products, buzz marketing and many unconventional ways like this. This term was invented by Jay Levinson in his book Guerrilla Marketing. So one who wants to get the insight of the original idea of guerrilla marketing should read this book. There are several other books that are very helpful in understanding this concept. These books include Guerrilla Social Media Marketing by Jay Levinson and Guerrilla marketing for job hunters by Jay Levinson and David Perry. These books give the principles and the tactics of the guerrilla marketing in the present world growing industry. This way you can easily got information about guerilla marketing.