Tweet - When you post or write your 140 characters on twitter and hit send it’s called a tweet or tweeting
Retweet – this is a tactic of republishing someone else’s tweet – the original tweet along with author stays intact – many people find this a great way to add content and acknowledge good stuff from the folks they follow
Hash tag – this is a way people categorize tweets so that others might use the same tag and effectively create a way for people to view related tweets – it will something like #marketing
Tweet Deck - As mentioned above, tweet deck can operate a bit like your desktop dashboard to help you set-up searches for key terms and respond directly.
Hoot Suite - Hoot Suite does a number of things, but for support one of the biggest tools is the ability to manage multiple accounts so you can easily jump back and forth from your personal account to the brand support account.
Twitter Feed - http://twitterfeed.com/ - this application allows you to feed any RSS feed into a twitter account – use wisely, you can send too much content that turns followers off with this tool .