In the case of singing, positioning, co-ordination, listening, balance, and forethought are all required. I know itís hard to change the habits of a lifetime because we use our bodies every waking minute. The downside of the voice is that you canít get your hands on it like you can with a guitar or keyboard.
The upside is that you carry your instrument with you wherever you go.
If you want to change your voice you have to change yourself as much as you would if taking up a new sport or learning any new skill. I can give you the tool box for a better vocal performance, you, however have to learn which tool works for which job and how to hit the nail.
You donít need to find time. If you really love singing you will do it all day every day: you wonít be able to stop! The difference is you add thought to your singing, you add listening and hearing to it, you have to think about what youíre doing so it becomes automatic.
Then you can stop thinking and start feeling.