What are the most important accessories for a new biker to get? I am a new biker and am going to be commuting to work on a hybrid. There are many cool accessories that help you carry gear, bike at night, track your rides, make adjustments and quick repairs like fixing flats, and more. It's very cool that there's so much that one can do to 'pimp their ride' so to speak but it can be overwhelming and it's hard to know where to start, especially for those (like me!) who are working on a budget and who needs to pick and choose because they can't afford to buy a ton of gear. My question is, where to start? In your view, besides the obviously necessary safety items like a bike lock and helmet, what are some of the must-have accessories that would be most important or most useful for a new or returning biker, and why?

Note: I know that there's already a question on the most useful accessory category. I want to focus on the most important accessories for a new biker, especially city bikers.
bike
helmet
lock 
puncture repair kit or spare tube and a mini pump
multi-tool 
lights 
first-aid kit