There so many way to improve inside, but this one of my favorites. Get in front a MIRROR, throw a magazines on the FLOOR open. Go get your 7 iron, now take your shoes off because we are going work on your set-up. With your FEET just on the corners of the MAGAZINE hold the club out in front of you, from there lower the Grip to your Belly Button. Now lower the Club head toward the FLOOR, you should feel like you are Bending forward, now Flex your KNEES a bit. With your shoes off you should be finding your balance. Now you can look in the Mirror to see how to are. Most likely you set up way different then you have been. This helps with a lot other things in the golf swing.