There are many types of lights available to cyclists so I recommend a headlight and taillight that will not only help you see where you are going but will help increase your visibility to cars and people around you. After you get your lights, be sure to get your Road ID.
I have been using the Hammer Gel Flask (or we also have leftover EFS flasks from Karel's cycling races) for a few years and it works perfect for me. First off, I like to run with something in my hand as it helps my form but I don't like the way a water bottle puts strain on the neck and messes with an athletes' running form. The gel flask is also great for consistent fueling because I don't believe in taking in calories at periodic intervals (ex. 30, 60,90 minutes or miles 4,7,11, etc.) but rather every mile. I'd rather take in 20-40 calories every mile (or 10 minutes) in order to keep my energy stable and to help postpone residual fatigue. Also, with the cooler temps, I find many athletes are not feeling like they need water (or sport drinks) during shorter runs and are finding themselves dehydrated during the day or overeating when they are actually thirsty (we have poor thirst mechanisms as humans) so this is an easy way to make sure you are staying hydrated during workouts. Certainly, this 4-6 ounce flask will not cut it for a workout over 45-60 minutes as I encourage at least 20 ounces of fluids per hour so you can plan on using aid stations in races for water or set up a bottle for refueling on your running route. Also, this flask is perfect during long bike rides or in a triathlon for it eliminates the need for handling/opening gels and wrappers and fits nicely in your jersey pocket (or fixed on your bike).
And to be extra creative, your extra fuel belt flasks make for great containers for your milk post workout (or for your oatmeal at work). For a discount on your Hammer Order - use 97495 at check-out.