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Jason Nazar has made serving small businesses his business. He’s the founder and CEO of , an online community for small-business owners to find and share professional documents. It serves as a vast repository of free and for purchase legal, business, financial, technical and educational docs — making it a key tool for startups.

Prior to launching Santa Monica-Calif.,-based Docstoc in 2007, Nazar was a partner in a venture consulting firm in Los Angeles where he worked with dozens of startups. He continues to foster innovation through his personal , where he regularly posts articles like “,” and his monthly “” series.

Nazar who tweets under the handle recognizes Twitter to be a powerful tool for startups. Here’s his list of the top five people to follow for priceless startup insight.

1. 
   Followers: 33,731
   Tweets: 9,859
   After selling one of his two startups to Salesforce.com, Mark Suster became a venture capitalist and joined GRP Partners where he focuses on early-stage tech companies. He also founded , a mentorship program designed to help the most promising Los Angeles-based companies get funding. His tweets give an insider’s look into the world of VC; he also offers tech and advertising tips for startups.
   Sample Tweet: Fun to read a short, real world example of integrated advertising lessons from @seanalex http://bit.ly/kVUYiP
   
2. 
   Followers: 111,578
   Tweets: 26,395
   Jason Calacanis is founder of the popular how-to site, Mahalo.com. Based in Santa Monica, Calif., he also founded the , an event that connects early stage startups with angel investors. His Twitter feed is chock full of useful tech and gadget news for startups.
   Sample Tweet: If you bought your iMac in last 12 months there’s no reason to upgrade to new iMac correct @gdgt? http://techme.me/BVVE
   
3. 
   Followers: 111,957
   Tweets: 12,705
   Matt Cutts is the head of Google’s Webspam team and a search-engine optimization pro. Based in San Francisco, he primarily tweets about the latest Google product news, gadgets and SEO for startups.
   Sample Tweet: The new version of Gingerbread has video chat built into Google Talk: http://goo.gl/ewEPc (Landscape mode is nice.)
   
4. 
   Followers: 5,644
   Tweets: 967
   Steve Strauss is a Portland-based lawyer, USA Today columnist and author of The Small Business Bible. He’s also the founder of , a resource for all things small business. Strauss consistently tweets useful small business startup advice and news.
   Sample Tweet: Finding the funding for your small business – USATODAY.com http://usat.ly/gR6vk8 via @USATODAY
   
5. 
   Followers: 58,824
   Tweets: 6,052
   A journalist from Marin, Calif., John Battelle is one of the original founders of Wired magazine and the founder of The Industry Standard, a now shuttered biz-tech publication. He’s also an authority on Web 2.0 and pens the popular tech and media resource, . He treats his Twitter followers to a constant flow of startup, tech and social media news — along with a healthy dose of photos documenting his life.
   Sample Tweet: Amex OPEN and FBook teaming up to help sm. biz – I’m judging. Submit your business for a Big Break here: http://on.fb.me/ieUjaZ

What Twitter feeds do you follow to keep up with Startups? Leave a comment and let us know.

– Ohngren is a freelance writer in Long Beach, Calif.