On the subject of adding fresh content to your website you will want to place links on your site which link to other websites which talk about the same subjects you are talking about. Any links to other websites which have content similar to yours will be followed by the search engines. When they find content similar to yours they like it and count it as fresh related content for your website. This is even more true if the other persons’ websites have back links to your site.
You can find link exchanges which want you to link to their website IF you first place a link to their website on your site. Of course, you want them to do the same for you. That’s how it works. But you risk losing the back link to your site if the partner site chooses to delete your link.
Make sure you link to your own BLOG because every time you add to the blog it will count as fresh content for your main webste. You have complete control over this.
With the rise of social networks we have another powerful tool for providing back links to your personal site. Make sure you provide useful information to your network friends and ask them to comment on your site (insert a hot link for them to use, of course).
You will find a link to this blog on my ABetterBiz website. Notice that it is a clickable hot-link.