The next important thing is your bag, I'm not too big on weatherproof bags, as they are ugly (style is important), however, I do recommend picking up a bag that's easily accessible. My personal favorite is the Thinktank Retrospective shoulder bag, as I can just sling the bag from my side when I need something. This bag also comes equipped with a sealed rain cover, which will definitely come in handy when the weather gets too severe. Ditch all backpacks, they can carry a lot of gear, but during this time of the season, you should be opting for something more minimal.

Update: I now use a backpack, disregard everything I said about messengers. Messengers and straps can't co-exist. For those interested in what backpack I use than look no further!

3. Neck Strap