Really, I’m not interested in what you had for breakfast, nor what the weather is. If you want to be followed by people who are not decision makers then ‘your breakfast’ or ‘which train you are currently on’ is a great thing to Tweet about. But that’s not what you want is it?
So…
1. Automatically Tweet your blog posts once a week – that’s a great way to start. If you use a WordPress hosted blog (like this one) it’s just a case of ticking a box and you are done.
Or
2. Every day just go through your suppliers. As a designer you have lots of them. Tweet a compliment about a DESIGN RELATED supplier &/or one of their products/services.
Or
3. Maybe tweet a promotion
Remember
4. Tweets are eventually deleted from the net. So you don’t have to worry about keywords too much. If you are writing a blog post then that post will be permanent and the keywords in it are important. So with your Tweets just keep it simple, interesting and professional. Think “interesting narrative”.
But would you…
5. Tweet about your competitors? Sure if you want to help publicize their work (??) and sure if they reciprocate and Tweet back.