All I do is press LOC (or APP if I can see that I am below the GS).
If I am above the GS, I use VSPD to get the 777 below it.
Once I have captured the Localizer, I start slowing down (unless it is a short final, then I start it earlier), lowering the flaps once the speed has reduced to speed reference on the Flaps Limit list (near the Landing Gear Lever).

Once I am 10 miles out, I normally have the 777 configured for the landing (Landing Gear down and flaps at 25 or 30 degrees, depending on my selected APPROACH REF (flying at approximately 160KIAS if flaps are at 30 degrees), I will then slow down to VREF + 5 + headwind/2 (headwind divided by 2). So with a 20 knot headwind, my airspeed will be VREF + 5 + 10.

During the arrival, I monitor the 777's descent, if it's looking like it will be too high to capture the Glide Slope, I will control the descent using VS/FPA button on the MCP.

Due to the 777 levelling of to reduce speed, this can cause the 777 to be too high at the time when you need to capture the GS. The VS/FPA switch will get used if I need to use it.