What do you mean, not good at writing supportive posts? Do you mean you don't feel what you say is good enough, or do you mean you don't feel you post enough supportive messages? Either way, don't beat yourself up! I don't post to every thread. I'd never get anything done if I did! I have other boards I like to post at (and I shouldn't be spending so much time at them, either), and I don't have enough time to post at all the boards I'd like to. I don't post to every congratulations-deserving thread (including in email discussion groups), or "I'm sorry" threads or whatever. You don't have to be perfect. Post once in a while, and that's fine.

You can't save'em all...you can't even help'em all. It doesn't mean you don't care. You're good enough as you are.