I wrote out all my best financial advice at the end of 2017. For your brother, I would add that he should fully understand any student loan documents he signs. Don’t borrow for frivolous things; if possible, work to earn money for living expenses. Don’t work so much that you can’t study; find a balance of the two.
All my best financial advice:
Track all spending; use an app like Mint or use spreadsheets. Some people like using cash and envelopes. Balance your checkbook with debit card expenses. It’s difficult to do anything else with your money if you can’t easily see exactly where it’s going.
Make a spending plan (aka budget) in whatever way you can actually follow; give every dollar a purpose. Again, an app like Mint or spreadsheets are free. Services like You Need A Budget help, too.
Learn the difference between wants and needs; work to spend less on both.
Research purchases to make sure they are wise purchases. Use resources like reviews and Consumer Reports or other data to select items that will last. Make a lifetime purchase, not a frivolous one. Reduce or eliminate debt before buying anything that isn't a need.
Have some way to cover emergency expenses; cash savings is good, a credit card is an okay fallback if you can pay it of soon, or a HELoC.
Check to make sure all your subscription services are things you actually use and are cost effective; drop those that aren't and find free or cheaper alternatives (gyms, magazines/newspapers, streaming services, etc.). Use your public library access to eBooks, use free podcasts, etc.
If you have a car, minimize driving; combine use of your car into multi-trips and do errands on the way to other errands.
Use any savings offered to you via employer with a match and contribute enough for the match; increase your contributions annually or with any pay increases--you won't likely miss an extra $25 from each pay check, but it will add up over time.
Pay down or totally eliminate high interest debt (credit cards, auto loans, student loans).
Roll over any old workplace retirement plans (401k/403b) to an IRA with Vanguard or Fidelity, unless your plan fees are very low or you have excellent investment options. Do NOT roll over a 457b plan to an IRA without consulting with a tax professional or lawyer.
It's never too early to plan for retirement, and every day you wait, you are losing money, so start now.
Read JL Collins stock series:
http://jlcollinsnh.com/stock-series/ If you don't want to read that whole stock series, I'll summarize: put just about everything you can into low fee index funds--with Vanguard, that's funds VTSMX/VTSAX and with Fidelity, it's funds FUSVX/FUSEX. For employer plans, choose the lowest fee index fund you can. If the employer plan doesn't offer one, ask for it!
Compare insurance options annually--health insurance, car insurance, etc.
Run the withholding calculator annually for your paychecks and determine if you should adjust to minimize your refund:
https://www.irs.gov/individuals/irs-withholding-calculator If you like getting a large refund, try using direct deposit to have your paycheck put into separate savings and checking accounts automatically. A bank will pay you interest, the government will not!
Don't borrow money for things for which you should save--cars, travel, entertainment, etc.
Use a credit card with rewards that you'll actually use--clothes horse? Store cards offer major discounts like the GAP card. Love travel? The Chase and Barclay travel rewards cards reimburse you for travel costs and don't lock you into one particular airline or hotel chain.
If you have a high-deductible health plan that is HSA-compatible, use an HSA. Again, even $25 per paycheck will add up to $600 or more with interest in a year. Many of these plans also allow you to invest unspent funds--if you have a healthy year, invest these funds, too.
If anyone relies on you for financial support, get term life insurance and for yourself, carry at least short term disability insurance (and long term, if you can afford both). Avoid "whole life" or "universal" life insurance products.
Avoid multi-level or direct marketing "home businesses." The Federal Trade Commission reports that 99% of people lose money in these pyramid schemes.
If you are able, donate money to causes and organizations you support. Research how the money will be spent to make sure it aligns with your ethics.