It also helps to take a "small" break from playing and Judge a few Tournaments, since most people tend to try to apply their playing style when it comes to answering questions.
If you are someone who is used to playing a fast paced game that tends to casually drop things like, calling/changing Phases, it has a tendancy to burn itself into memory. The old addage, "Practice as you Play", is very important, since its much easier to do something naturally, than to have to think about it when the situation arises. "Sloppy is, as Sloppy does."
If you find yourself unable to do without the game, at least try to use proper playing habits. It may sound corny, and frustrate your opponent to no end (as he may start to think you are trying to be a funny anime character), but it will get you in the proper frame of mind when it comes to dissecting complex Chains and resolving effects that occur at certain phases of Game Play.
Remember, even if you dont have a card like Messenger of Peace face-up on the field, your opponent may still have a card effect that can be, or, can ONLY be activated in the Standby Phase, so you will NEVER just go from the Draw Phase to Main Phase 1, unless an effect removes or skips that particular phase.
Im sure my fellow Judges here can attest to the fact that many times, you will witness a player draw a card, and go directly to their Battle Phase without a word. Again, a fine example of sloppy play, which can come back to haunt you as a Test Taker if you fit this profile.