One way of thinking about consumer startups (Twitter, FB, Google, …) is that you want to create a product that people use all the time. Daily. If you’re not using it daily, you can easily forget about a site, and then it’s an uphill battle to get real engagement and user growth.
So I think of this as my pinned-tab startups. The tabs in Chrome that I have pinned. Right now, of the newer startups, Yammer and the brand new engagio are in there.
My pinned tabs look something like this right now: