One more thing: at 30 nm from your destination airport you need to be at 10,000 and going 250 knots.  To make sure you do this, you can use this trick:

Create a fix at your destination with no bearing, just distance, like this:

KDFW
/30

You should see a dashed ring around Dallas Fort Worth Airport -- it will be 30 nm in radius.  This is a big help to get you down low and slow enough.  Make sure you are at 10,000 and 250 before you cross that line.