BizTech101.com -- "the best social media and web tools for business"

Tool:
Twitter

URL:
http://www.twitter.com

Key benefit:
“Microblogging” tool that helps you stay connected with your clients and other organizations or individuals that you want to “follow”

Tip:
Use Twitter to brand yourself / your business and position yourself as the leader in your field.  Present only very useful content: great news, insights, tips, URLs or other relevant information. Then start following others, [...]

Tool:
Network Solutions Domain Name Tools

URL:
http://www.networksolutions.com/and WHOIS service

Key benefit:
Conveniently search for availability of domain names and also see which organization is behind a particular domain name (WHOIS Search). Network Solutions is a trusted company, unlike some shady operations that after you search for a domain, try to buy it before you can and then try [...]