Stay away from credit cards; two maximum. Use them when needed. Never finance; only for big ticket items like a home, land, or a car. If you cant pay a non necessity item off within 6 months to one year then hold off. Never spend over 30% of available credit, for example if the credit card limit is 10K, your charges shouldnt exceed 3000 each month. Lowers FICO score. My dad taught me that. Start a LLC only 50-100 bucks for filing and registration in most states. Comes in handy for side ventures where your personal finances wont be affected in the event of investment hiccups (aka bad investment when flipping houses). Contribute the maximum to 401k, preferably 25%(the recommended ratio of rent to income), so if you have roommates or live with relatives, use that money you would pay in market value rent for investing; either company's retirement or open a roth ira. Also, once you are vested in 401k, feel free to use that matched money to invest outside of your company's plan. Fidelity offers a Brokerage Link option which allows investment in different funds. My favorite is FBIOX though biotech industry can be volatile. Its your money so research and invest as you wish.
Also stay abstinent, and if you lack discipline ladies stay on birth control and fellas use condoms or get a vasectomy until you are financially, spiritually, and emotionally ready to raise a child with someone that you have bonded with. Court ordered child support is not your friend fellas, and ladies who have their shyt together, mentally and financially do not want that burden. Kids can be a blessing if planned by both parents, with love, or a curse as they are an emotional and financial drain when not. Working two jobs, starting that business or finishing school should be done BEFORE starting a family; the child should not be a motivator for goals that you should already be obtaining to begin with. Seen too many playing catch up in 9 months after party and bullshytting for years. Not fair to leave that kid on your mama or auntie's living room floor nights and weekends even if you are working or going go school. This is child neglect and a drain on your support system. Also, stay away from needy nikka relatives.
Lastly, you can say NO when people ask for money and no explanation is needed. Only help those who are trying to help themselves. People get in binds but those friends or relatives that are always in need, yanno the ones with Final Notice electric bills or rent court papers filed at least twice a year but always manage to have new clothes, a cabinet full of patron and goose or can afford rock cocaine; cut them loose. Most likely you will enable them. The time and money wasted can be spent on more important people/things. When you are dead and gone they will still being doing the same dumb shyt, per my granddad on his deathbed.