Join Date: Feb 2015
Location: Oklahoma, USA
Car: '15 Outback 2.5i Premium
Feedback Score: 0 reviews
Where will you be going and doing? What to have depends on the conditions.
Having a charged-up jump-start pack in the car is a great idea. Even if you never leave the city.
Check the spare tire and tire-changing equipment periodically. Having (and knowing how to use) a patch kit and pump may be useful in some conditions, but I don't see them as being particularly common. If you do have those, check them periodically to ensure they are in good condition and work.
What to have in a first-aid kit beyond the very basics depends in large part in your capabilities to administer first aid.
Bring winter gear (at least a sleeping bag, warm gloves and boots, and warm clothes to change into if yours get wet) if you'll be traveling through remote areas in winter, or when there's a realistic chance for bad weather, even if you'll be in not quite remote areas. For summers in the south, I usually don't bother.
Keeping food and water stores in the car doesn't seem practical unless you're in really remote areas a lot. Take some when you think they might be necessary. If you want to always have them, it's probably wise to replace them periodically and either use or toss out the old.
Find some place to stow a partial or full roll of TP. It's light, cheap, durable (if it doesn't get wet) and can probably fit in some out-of-the-way cranny. If you need it, you'll be really glad you have it!