Basically,
Give them FMC as much info as possible in regards to Descent Forecast page - remembering tailwinds are most important.
Put a fix around the airport of 10miles and 25miles (25 for MSA)
If your 210kts by 10miles your quids in and aim for this all the time.
When your in HDG SEL you can put the Centrefix 'CI' point on top or if your clever make yourself a little circuit with what you think you might get, and use the Vertical Profile indicator.
When you've got it figured, use the standby instruments to monitor how high on the glide you are - it's more accurate farther away.
Good luck, it takes time.
Remember, 210kts or Min clean (UP bug) by 10miles at the latest, and in the decent, tailwinds are your enemy.