It doesn’t really matter whether your title tag is long or short, AS LONG as the most important keywords are right at the start, or near the start.

If you look at the search “home business” for example, you’ll note that most of the top 10 sites have the word “Home Business” right at the start of the title

Home Business – Home Based Business – Work From Home – MLM – Work …
Our magazine offers home business information on work from home and work at home as well as articles on topics ranging from telecommuting and home office …
http://www.homebusinessmag.com/ – 30k – Cached – Similar pages – Note this

Home Based Business, At Home Business Opportunities – Entrepreneur.com
Information and resources for starting and running a home-based business.
http://www.entrepreneur.com/homebasedbiz/ – 50k – Cached – Similar pages – Note this

Home Business – Working from Home – Telecommuting – Work at Home Jobs
Whether you’re thinking about starting a home based business or want to find work at home jobs so you can telecommute, this site has what you need to be …
homebusiness.about.com/ – 31k – Cached – Similar pages – Note this

Home Business Research
Home Business Research offers current home business information, guides, opportunities, tools, research, current work at home trends and resources for start …
http://www.homebusinessresearch.com/ – 40k – Cached – Similar pages – Note this

Homebusiness
10 Best Home Based Business; Best Home Based Businesses; Home Based Business For Women … Christian Home Based Business; Home Business Opportunities …
http://www.homebusiness.com/ – 25k – Cached – Similar pages – Note this

Home Business: Start Your Home-Based Business & Work from Home …
Information, tips and articles on how to start a home business and small business. Business ideas, business plans, marketing tips, e-commerce guides, …
http://www.powerhomebiz.com/ – 39k – Cached – Similar pages – Note this

Decide on the most important keywords for that page, and then make sure that you have those keywords at the start, or near the start of the title