Twitter deserves a category by itself. A free service you can use in many ways to market, build your list, provide value by sharing your expertise, etc. You can create multiple accounts- for each niche, personal use, etc. Sign up free here. Here are some Twitter resources we’ve found useful. Almost all are free:
- TweetLater for scheduling your tweets
- TwitterDMer for sending new followers a thank you message.
- List of Twitter Apps: