Tweetosphere

I was curious for people's suggestions on how much to tweet during the day. I only tweet when I have a link to my site. I'm willing to tweet more but I don't want to put random stuff up for the sake of tweeting. Is there a # per day you shoot for, or am I looking at this the wrong way?

Also, what's the best way to gain followers? Do you use sites like Buzzom that allow you to follow tons of people at a time, use Twitter search to find people talking about your stuff?

Right now Twitter feels like a bunch of wasted time but I know I just don't "get it."

Thanks in advance!