There are a few things you can do to help improve your ability to judge distance. One is to simply spend more time practicing. The more you do it, the better you'll become at it. Another is to try and break down the distances into smaller chunks. For example, if you're trying to hit a target that's 100 yards away, don't think of it as one big distance. Instead, focus on hitting 10 targets that are 10 yards away each. This will help your brain better process the information and make it easier for you to gauge the distance accurately. Finally, make sure you're taking into account all of the variables that can affect how far something actually is. Things like wind speed and direction, elevation changes, and even the curvature of the earth can all impact how far away something truly is. If you can account for all of these factors, you'll be much closer to getting an accurate estimate of distance.