When you "pull" the club back to start your backswing...
It's really easy to let your arms "collapse."
This is the exact opposite of staying "wide," which is a key ingredient to maximizing your speed, power and distance.
So, instead of pulling the club back, try feeling like you're pushing it.
I'll show you what I mean in the video above. I think this works best using the Drag-N-Fly, but you might be able to achieve a similar feel with other things.
By the way, this video is a clip from one of the all-new lesson videos included with the Drag-N-Fly (you get 17 videos in total).
If you're interested in getting one, too, you can learn more about the Drag-N-Fly here.