when you start following people in twitter just say "hi,thanks for following" to create an impression and also making them to remember your name.

then listen to what people are tweeting.start commenting on some of the tweets to create conversation with them.

i think the biggest mistake people make is pitching buy their product every day.some even worst is posting tweets every 3 minutes.that really annoying people.my suggestion is don't use twitter to pitch your product.instead tweet about new blog post or new video that you made.then ask them to visit your blog to see it.

always direct the traffic to your website.then you can recommend some product as affiliate on your blog after posting some good blog posts.