First of all i think one the main things to look out for is cheaters. There are many cheaters in this world we live in. I don't know how you could live with yourself knowing that your a cheater. Cheating could be on homework, on a boyfriend or girlfriend, or even on everyday tasks. Cheating is something you can control in your lifestyle. If everyone looks out for cheaters it would be a better world.
Another thing i have learned to look out for is boys. Through my life i've learned and loved many things about guys, but not all guys are good. Boys can back stab you when you least expect it, and never talk to you again. You need to watch your back at all times and always know theres an end to all relationships. You just need to figure out when the end will come.
I have also learned to look out for need friends i begin to hang out with. When you begin to hang out with new people you have to learn to have trust before you begin telling secrets. I have learned in many ways, that this can go well, or not.
Mostly i have learned to look out for my family, and friends because they all mean the world to me. If anything happened to them i dont know if i would be able to live on.