Interesting topic. The only offline advertising you can really do will be word of mouth, radio ads, and maybe some freeway advertising. I never really gave this much thought, but it is something that I will look into.
What do you think about offline marketing? Do you like to market your website using offline marketing techniques? What techniques would you like to accept?
what about classified ads thay work some time. just depends on how good your copy is. I would like to recommended a few books to the first one is making money with classified ads and the other one is how to get rich in mail order both by Melvin powers just Google and you will found his books or just go to your local library and request it they will order it for you for free
I think the answer really depends upon what type of websites you have -- i.e. how you monetize your traffic and what margins you're earning.
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I swear, by my life and my love of it, that I will never live for the sake of another man, nor ask another man to live for mine.
But right now you have so many new windows open, such as Twitter, that I prefer to put all my energy there (for now).
Rule of thumb: Never miss any good opportunity and be flexible.
But also look at your budget and compare the different opportunities you have and go with the one that makes the most sense.
Oh and of course, don't just rely on advice from others. If you think something may help get you traffic and boost your ROI, then go for it and try, and if it works, do more.
I am also a writer for Serpholic Media. You can find some of my articles here: Serpholic Media Blog
Direct mail can be a good option for offline marketing. The cost of a post card and postage is around 50 cents. The success the the campaign however will depend on the quality of the mailing list.