Bass guitar - drives the groove

At the worship conference I was at a few weekends ago - at Hidden Acres - I went to a seminar on leading worship and a bit on practicing. It was supposed to be on something like that, but wasn't totally. It was more simply about the importance of getting a groove going - which really means the band is perfectly together - which comes from the bass player and the drummer being perfectly on - and really, the bass player holds it all together. He is a rhythm instrument and a note instrument.

One of the results of that is that we are practicing with the click track from now on. It's not always easy, but is good for us. I personally need the practice. I think I may buy some sort of plug-in metronome so I can use it anywhere. Benjamin, my son, needs this (he's 4 and incredible for a four year old - but a metronome at this age would be great for him).

Do you use a metronome or click track (don't tell me you can never find one that works - that they always slow down or speed up). Have you used one? Why don't you use one if you don't.