Here's a list of a few things you should get your hands on in preparation for enjoying the sunshine:
Sunscreen. Protect your skin and prevent premature ageing. UV rays can harm your skin, even in cloudy weather, so imagine how much damage can be done in direct sunlight! Try a cream with Vitamin E. Vitamin E is a natural anti-oxidant, prevents premature ageing and also prevents any environmental stressors from getting into your skin.
The last thing you want is skin like leather(cringe)!
Sunglasses. Protect your eyes and get stylish while you're at it! Make sure you find the pair that's right for you. Round lenses are in at the moment. Taped lenses...not so much.
Deodorant. Please people, I beg of you. Buy deodorant. Use deodorant. Love deodorant. Carry some with you in your bag just in case. Hot, cramped trains are already bad enough. We do not need to inhale your...essence.
This will help set those nasty smells and pit stains at bay, and save you from a lot of nasty looks.
And, you won't have to carry those big, bulky books around anymore!