Good players need to be able to see the bunker as a friend. From a good lie within 30 feet of the hole,
an up-and-down should be a regular event. Even on longer greenside shots,
you’ll consistently get the ball somewhere around the hole.

Players in single figures need to ensure that finding a greenside bunker isn’t a shot lost. 

It amazes us how many single figure golfers don’t see the sand as a friend.
We’ve often find these golfers have mis-interpreted written advice – “draw a line in the sand about an i
nch behind the ball and practise entering the sand there” - many interpret that tip as meaning
their leading edge should enter the sand an inch behind the ball.
Unfortunately that leads to digging and poor bunker play. So here’s another visual practice aid:

You’re trying to ‘slap’ the start of the box with the sole of your wedge and then accelerate
the clubhead through and under the ball to take all the sand.

If you’re interested in reaching an advanced bunker skill level; be able to get up and down enough to frustrate your competitors;
and save your scorecard, then you’re ready to become a ‘Wizard of the Sand’.