There's probably only so much studying you can do for phase 1 - you can brush up on mental arithmetic and possibly go over some diagramming but the spatial reasoning(shapes) is something that I believe you simply can/cannot do! Personally, I'm focusing on learning the pre-study material and trying to pick out and understand the Key areas. Do you really need to know exactly how many seats there are on a 737-800? Or would it not be more sensible to bracket the aircraft, such as having a ball park figure (150-180) for larger 737s etc. All this information, I believe, would be on a Flight Plan so I can't understand why an ATCO would have to know the exact amount for every a/c variation. Same with speed; the main Boeing and Airbus frames have cruising speeds of 430-500knots and again you can group these depending on size/Number of engines etc, whereas props are 230-250kts.
I'm doing plenty of work, but personally chilling out a bit will give me a better chance.....hopefully!! Good luck all.