Remain clean as long as possible, 250 kts, or minimum speed clean (Vref + 80) as long as you are not high. Roundabout 15-20 miles out, start gently extending flaps to 5 Vref + 60 (usual maximum without gear down). The aim to to try and start descending on the glideslope without using much or any power. If you need aerobraking, Flap 10 gives more drag. On the 747, extending to Flap 5 takes a long time. A lot of pilots take more flap and gear at 2000', but I used to find 1500' was sufficient (just). Gear down, Flap 15, Speed Vref+40. Then speed reduces and further Flap 20/25 by 1000' where speed should be stable with power coming on at Vref +5.
4 1/2 years since I flew the 747, but something like that.