Permission marketing can be easy to implement. In its simplest form, you send out an email newsletter to your customer database once a month, containing news, helpful information and small adverts for your products and services. If someone has already purchased from you, chances are they like what you have to offer and will buy from you again. A newsletter shouldn't take more than a couple of hours of your time once a month, and you should see an increase in sales almost immediately. Remember that permission marketing means exactly that - you must ensure your customers have given you permission to market to them.
Viral marketing is a little more difficult to implement.
You need to come up with a free product that contains your marketing message and will be spread from one person to another, just like a virus. For example, you could create a screensaver, containing your marketing message, and offer the screensaver as a free download on your website. Then you encourage the people downloading it to share it with others. Put your URL on all your stationery, and on all your email communications. Send them your product for review, and ask for their comments.