Note to Ian B:

I'll bet when you were playing bass a lot, folks said you had "Big Ears". (unless that's strictly a North American term)
That's about the biggest compliment that one musician can pay another. It's hard to teach someone how to 'anticipate' where the music's going, but you CAN teach them what clues to look and listen for.

As an example (simple, but not always obvious to an inexperienced player) the moment your ear hears a seventh in the one chord, you prepare to play the four chord. Spending half an hour with a student, getting them to recognise the sound of a seventh instantly, is a start, in the 'big ears' department.

Just thought of something though, that might make 'watching other players' difficult. If a person is naturally shy, they may find that whole procedure awkward and a bit scary or intrusive. All I'd be able to suggest there is that OTHERS (good musicians) don't, so do your best, and it'll probably get easier.

Rick