@dan - Welcome! I recently put together this list of articles I've written over the past year to help get creators started. Feel free to skip to the section(s) that are relevant to you: http://www.crowdcrux.com/best-crowdfunding-articles/
On the topic of Twitter, I see it as a long-term commitment. The sooner you get involved and learn how to drive traffic/gather followers, the better. You are essentially building a marketing platform over a series of months. Also, don't just toot your own horn. Would recommend a ratio of at least 1:6 depending on the message you are tweeting out, meaning 6 awesome links, quotes, etc. that your audience or people in your industry might find interesting to the 1 message "check out our new product." More info on this: http://www.crowdcrux.com/kickstarter-so ... -kawasaki/
or this youtube video (long): http://www.youtube.com/watch?v=rZCDGBnC058
A lot of social media is trial and error and experimenting what works/doesn't for your audience or business niche. Personally, I love Buffer for scheduling tweets and tracking analytics. You can also use Bitly to track link clicks or Hootsuite.