Have to say our practice ground has markers and flags at 50, 100, 150 and 200 and having used Sky Caddy to measure them they are actually pretty accurate +-1 yard. That means when I use it I can be fairly happy knowing how far I am hitting each club. However the downside is the wind tends to be predominantly into and from the left which means and fades or slices are exaggerated and it is hard to draw a ball into the wind.

If I go to my local range I have the opposite problem where the wind is normally with and from the right and like most ranges I'm not sure the yardages apre particularly accurate so it does make a mockery of club selection.

As a result if I am using the driving range I tend to make my sessions a lot more about mechanics and trying to groove in any swing adjustments from recent lessons or correcting and flaws (having already sought professional advice). In these sessions I'll hit wedges to warm up and then work on either odd or even nuimbers up to the driver and then back through the other side of the bag hitting approximately 100-120 balls. If I am concentrating and checking my swing and fundamentals these 120 balls can take at least 90 minutes plus.

If however I am on the practice ground where I can get more instant feedback (divot depth and direction, distance etc) I tend to vary my practice and after warming up will hit 20 at the 50 and 20 at the 100 yard markers trying to average at least 15 feet (50) and 20 (100). Doesn't sound much but if you can get into that area each time you are not going to 3 putt and will make a few as well.

I then tend to spend an hour working on longer shots trying to hit my 5 iron over the 150 marker and then trying to get 5 woods as close as possible to the 200 yard mark. I'll then hit a few tee shots with my hybrid and 4 iron to replicate playing longer par 3's looking to land it down a 15 yard corridor (taking that as an average green width). Might hit a few drivers (not reallly allowed given the length but if it is into the wind I'm not long enough to bomb it out the far end) and a few 3 woods. The number of balls I hit also depends how busy it is and how bothered I can be to go out and pick them all up again