If your house is anything like mine, you too have a growing inventory of old cell phones, video games, and DVDs sitting around, gathering dust.

You could always try to sell them on eBay, or at some trade-in site. But the problem is that unless you’re already a proficient user of eBay, or similar sites, the process of auctioning off goods is not all that intuitive, and can easily turn into a time-sink. Now, there's an easier way. 

“When we launched in the summer of ’08, our goal was to make a second brain for people -- to help them remember stuff better,” says Evernote CEO Phil Libin. “Everyone could use a second brain.”

Three-and-a-half years later, some 22 million users have discovered Evernote, without any marketing or advertising by the company. It’s all been by word of mouth.

If you ever wonder what they’re eating for lunch over at Dropbox, Square or Yelp, the guy to ask is Zach Yungst, co-founder of Cater2.me.

Yungst and his co-founder, Alex Lorton, are Wharton graduates who have brought their business expertise to street food vendors, matching them up with tech startups that order in lunch most days.

It’s hard not to become a bit nostalgic on the eve of this year’s Macworld convention, the first since Steve Jobs died.

After all, it was 28 years ago this month that Jobs unveiled the very first Mac at the first-ever of these events.