Be sure you end up with 2 white coats (some progs do none & you buy, some 1, you want 2)
Extra socks and undies (time for laundry does down)
Dry clean your stuff before starting
Make sure your car has been recently tuned up and fresh tires (you ain't got time for that **** to go bust)
I would have rental car insurance on it and roadside
Ditto the most comfortable shoes you can get, and bed/bedding.
If you're not in one you're in the other.
Disability insurance to supplement the program's
Health insurance likely has a deductible. Depending on what if any monthly Rx's you have you need that much off the bat OOP, or doc copays.
Dental work - I can't tell you how many ppl have issues with this
Preventative medical care, IUD, etc
Moving costs
First month / last month / housing expenses
When you know where you are going, identify a good car mechanic, drycleaner, dentist, PCP near you right away, it will save you time.
I like the White Coat clipboard, PocketMedicine, Sanford Guide to Abx.
Laptop, tablet, cell phablet phone
My desktop comp is hooked to a 52 in plasma screen with wireless keyboard & mouse, I liked looking at tele from home on that
I like having a home printer/scanner
Slow cooker with timer & recipes
Espresso machine
Blackout curtains or a facemask essential for nightfloat
Foam roller (your back will thank you)
If you don't have a watch, a cheap one is a nice social grace in clinic (looking at it signals patients politely)
Plastic pocket protectors from Amazon (if you don't, you will regret it one day, I promise you)
Nametag for your stethoscope ($4 on Amazon, look very nice, saved my $160 steth at least 5 times)
Penlights (a pack of 6 is like $5 on Amazon and will last your whole residency)
TLDR
Notice, some of the above you might have, some is optional, some isn't.
If you don't already have money aside or are budgeted for moving at the least, I would save that money.
Lord knows you will likely need it your first month.
Remember, you're gonna have to go to work for for a few weeks before getting your first paycheck.
So unless you have family, saving, special residency relocation loans floating you....
how are you paying to live until your first paycheck?