When I run across an interesting website, I often subscribe to their newsletter or blog, if they have one. Reading the newsletter over time allows me to temper my enthusiasm for the writer and adjust accordingly (i.e. unsubscribe).
I currently subscribe to the following three newsletters/blogs--and I learn something from every issue.
1) The Blog of Tim Ferriss
When I heard about Tim's book "The Four Hour Work Week," I was intrigued by the idea of outsourcing and automating most of your work. I visited his website, and subscribed to his newsletter, and then eventually read his book (hmmm...I guess this is what he hopes his subscribers will do!).
I enjoy reading his blog entries--his philosophy is not to just reduce your work week, but to make sure you are really doing what you want to be doing the rest of the time.
2) Breaking Free
I met Brian Armstrong at my breakfast club, The Houston Entrepreneurs' Forum (if you live in Houston, guests are always welcome). Appropriately enough, he writes about his adventures as a serial entrepreneur, with about an equal emphasis on successes and failures.
I enjoyed his recent post on "9 businesses I started which utterly failed."
3) Bill Myers Tip of the Week
Each week Bill sends out a tip, technique, or strategy about doing business on the web. His newsletters help me stay abreast of some of the trends on the Internet and new resources available (usually free).
He also discusses ideas for new businesses you could start on the Internet--with very low (like $20) start-up costs.