Already know what AW will say
Oxidant,
Well, you ask a very complex question. Here is my attempt to answer it:
1. Life - You only live once. Make sure to make the most of it. Try different things (all legal of course) and pursue new experiences. Build a strong network and work hard to maintain it. As you get older you will notice that you have fewer friends. Its natural as people pass on or pursue their own life goals which may not include you. Enjoy every minute with your family because folks will pass on or get married and start their own families and relationships with your siblings will change after marriage. Always have manageable expectations and learn not to have unrealistic ones that you can not achieve thereby disappointing you. Nothing worthwhile in life comes easy. Don't pursue the low hanging fruit and aim for the higher ones.
2. Education - Like Gurey said, try to take on the least amount of debt. You can learn just as much in the work place. Try to study fields that have a great financial payoff. If you chose not to or can not, study something to get yourself the coveted Bachelor degree. Remember what you study and what career you pursue may not necessarily be the same.
3. Shukaansi and Marriage - Do it in moderation. Learn from your relationships with women and find out what you kind of woman you can pursue a relationship with. If a woman has serious character flaws, you can't fix it. If she has correctable problems: awful cook, poor cleaner, you can manage her to success. Always marry a younger woman, a minimum of 5 years your junior but no more than 10 years younger. Don't dwell on her qabiil if you marry a Somali because if a woman loves you, she will not raise such topics in front of you (what she does privately is okay after all you would do the same). Look at a woman's mother, that is the future her. If her mom is a ball buster, realize that she will be taught the same skills. A woman's family is more important than her qabiil.
Also marry a woman who brings financial stability. God forbid you were to die, make sure she can provide for the kids. Looks are important but in these uncertain economic times, having an additional breadwinner can help prevent greying or bidaaring of your hair until the 50s when God intended such things to occur.
4. Career - Ability to excel is important but even more important is making sure that your accomplishments are known to everyone. Being humble and meek won't get you anywhere. Take charge and perform what you deem to be the right thing unless your boss feels otherwise. Remember you are a black man so the bar set for you is much higher than the white folks who tend to take care of each other. Always network and look for new opportunities. There is no loyalty in the work place. Treat your coworkers as enemies you have not yet discovered. I like to go to job interviews at least twice a year just to find out how much my worth is out there in the market. Never ever underestimate the importance of networking even after work hours: people hire people they like all things being equal between two candidates with comparable skills.
Oxidant, good luck