there are many ways to fly, but to be frank any of them will do. I've seen L1011's with gear down and flaps down from 17 miles out...following other planes of course and that's the way it has to be.
so, you must start to think, but think backwards. You certainly want to be at vref plus additives no later than 1000'/500' depending on visibility.
near the outer marker (five miles) gear down and half flaps or so.
so how do you get from 250 knots to the above?
on the glide 3000' agl is when you should be in a position to slow down...this is a tiny bit more than 10 miles from the runway.
I had the pleasure of flying one type that was quite easy to do 250 knots to the marker and still slow to Vref well prior to the runway.
apch flaps by 3000'
gear down 2000'
final flaps before 1000'
should hold you in good stead.