1. Hashtags are a great way to spread your tweet to a targeted group--but #please don't #overuse #hashtags because that's #really #annoying! #socialmedia #socmed #tip
2. 3rd party management programs, like HootSuite, Seesmic, or Tweetdeck provide more versatility than the twitter website. You can keep track of your lists, hashtags you follow, AND your facebook profiles and pages, all from the same program. Also, these three have mobile app versions, so you can use your phone or tablet to keep up to date.
3. The Buffer app is a great way to not only ensure that you always have tweets going out (you pre-write and queue them up), but the program analyzes your follower activity and sends out your tweets at the optimal times. I like to use this as I'm going through my RSS feed and find interesting articles to share.