You'll need some sort of jacket for colder days, which it may already be where you are. Make sure it wicks sweat, so you don't over heat. I have a super light weight one that I wear mostly (I'm in So Cal), but when it gets colder, I add arm warmers and, if it's even colder, I wear a base layer under my jersey (also one that wicks).

There was a thread not too long ago on the main cycling board all about what people wear for cold weather. You should check that out and figure out what works for you. When you are dressed right, the cold

When you get bottles and holders, get two, in case you don't ever intend to ride more than 20 miles, which I somehow doubt.

Ask your LBS what you should put in your bike bag for tire changes. They'll tell you your options.

ALWAYS carry your phone on you! If you are riding alone, it's a good idea to let someone know where you're going. I text my dh sometimes and let him know where I'm at along my route. But lately, I always ride with a friend. Leaving for a ride in about 5 minutes as soon as my friend calls me, actually. I'm sitting here fully ready to go with helmet, sunglasses, shoes, etc.

Oo! She just called. I'm off on a new adventure!!!