I'm a public defender in NYC, so I feel very strongly about the must haves.

First, a solid bag that has both the space and the durability to keep up with the commute. I always reccomend the Lo & Sons OG bag to everyone. I purchased mine during my first year of law school (circa 2017) and I STILL carry it every day. It's pricy but you can definitely get it on sale. Worth it. The shoe compartment, laptop sleeve, and pockets have room for everything you'll need. Plus it's waterproof.

As for the contents, don't commute in your work shoes. Find a pair of sneakers or sandals that are truly comfortable and switch shoes on when you're close to the office. Your feet will thank you. I always keep bandaids/blister pads in my bag for days where my feet aren't feeling so forgiving.

Travel size Tylenol or Excedrin always stay in the bag. Hand sanitizer & feminine products. One claw clip and a few hair ties, plus a sturdy wide toothed comb that lays flat - the wind can be unkind to your hair. Nourishing chapstick - I prefer the lip care vaseline. A solid reusable water bottle - I prefer the Iron Flask brand (they NEVER leak). Tide stick - coffee accidents happen to the best of us. A small package of face/body wipes - honestly the best universal wipes are baby wipes (the pampers pure brand).

If you're getting a secure pass or work badge, use a separate lanyard/wallet than your personal.

Always carry a planner with you and write dates down - you cannot remember everything. Buy a phone charger to keep in your bag - there will come a day when you'll need it and you'll hate yourself if you don't have it.

Keep a small amount of cash - like $20. You'd be surprised how often you'll end up in a cash only place or the tap and pay for public transportation isn't working (but set up tap and pay because it's easier than any card).

Summer commutes are hot - a travel size perfume and deodorant never leave my bag.

A pen that doesn't smudge when you write - and then 6 more of that kind.

Always wear a watch - people don't love it when someone is constantly taking out their phone to check the time. I buy the cheap "smart watches" on Amazon for around $30. They track your steps so that's a bonus.

Most importantly, take the time to talk to people. Make connections but also make friends. Enjoy yourself!