How can i be more sociable over twitter?

[Thats just me.]

i talk to people on twitter but i never have much to say and i can never think of anything does anyone have any advice for this?
Also, i've been talking to my local radio presenters who im a huge fan of but i cant think of anything to say to them, could someone please help me? (they also talk to me but sometimes i dont know how to hold the convo together because i dont want to freak them out or anything)
Thank you!!

[Jason]

be funny, sarcastic, polite, measured and friendly, if the situation calls for it flirty.

a conversation cant be forced it just happens, ive gone whole years without saying a word so I understand where your coming from, just find something your both interested in and share experiences/ opinions and make a joke now and then to keep it interesting.

to be bored is to be boring

do something interesting and before you know it you cant stop talking.