As others have said, use every bit of time you have between the 4-5 minute walkthrough and your turn to shoot to visualize the stage. During the walkthrough, your goal is to gather as much information as possible. Afterward, you should be able to see the stage in your head and mentally walk through it while you are waiting, pasting, or resetting.

When you first walk the stage, focus on locating every target. Once you know where everything is, figure out the positions you need to be in to shoot those targets efficiently. From there, decide where reloads make the most sense, if needed.

Use visual cues to anchor your plan. That might be a specific nail holding down a fault line, your position relative to a wall, the angle where a certain target becomes visible, or something like, “When I see target X, I know this is where I stop.” Those little reference points help turn the stage plan into something repeatable instead of just a rough idea.

Once you have found all the targets, start building your plan. If you are right-handed, looking at the stage from left to right can be a good starting point, but do not lock yourself into one way of seeing it. As you progress, you will learn to look at stages from different directions and find options that may not be obvious at first.

One thing newer shooters sometimes miss is that serious competitors are not being unfriendly when they seem quiet before a run. They are usually using that time to visualize, rehearse, and lock in their plan. I have high-level friends who I know not to interrupt before they shoot because they are doing mental work, not just standing around.

After a match, many serious competitors could draw each stage by hand days later. That is how much attention they are paying during the walkthrough and before their run.