One thing I've been doing over this weekend, is actually listening back to recordings of my own on-air programs. By listening back to old station 'logs' from previous radio programs, I've realised - I'm getting very sloppy with my vocal presentation. I've been speaking too fast, not articulating clearly enough... these are just some of the things I'd not realised I'd slipped into the unconscious habit of doing.
I know I've grown-out of a speech impediment I had as a child, but still - if I do not concentrate enough, my vocal accentuation tends to get a bit sloppy and slurred. It's all about 'focus', I guess. I appreciate that I can find myself distracted, if I don't keep an eye on the immediacy of what I may be doing mid-program. Part of it may be due to familiarity - being too comfortable with the media, and letting my guard down without realising it.
Presenting radio is always a learning process... even a re-learning.
So - listen back to yourself as much as you can. Be self-critical, but not unrealistic, and always appreciate ways how you can sound more effective during your program. It's a great way to understand your own strengths and weaknesses when it comes to listening to your own presentation - as a listener.