Have you got a big enough watch with lots of buttons. Gotta have one of those before your 5th lesson.
Shoes/boots with smooth soles can become a right pain if the rudder pedals are slippery, have lost their friction surface or are in a Tomahawk (leaking water). Boots that lace up tight all the way to the top can restrict the ability to push brake pedals with the tip of the toe. RAF boots often have a design that allows the boots to be tied tight (-ish) but still have a huge ammount of flex at just the right point. If too tight, you can't get to your laces once strapped in! I've worn no other footwear than surplus RAF footwear for the last 12 years of commercial flying. If the Betty Windsor Flying Club use them then they must be half decent?
If you are going to get sunglasses, get ones that won't pinck your lugholes when you get a tight headset on. Otherwise you'll get deep and painful marks on the side of your head. Rayban make ones with thin and flexible wired arms.
Hope this helps.