Your finals are over. Now is a great time to learn some basic maintenance. All you need to know is on the Park Tool site. Every possible thing an average Joe would need to do is illustrated in excruciating detail. Take the time to learn it.
You'll normally need 4mm and 5mm hex keys.
Loosen the 5mm bolt in the center cap. Just loosen it, don't take it out.
Loosen the two 4mm bolts on either side of the stem steerer clamp. Leave the bar clamp alone.
Push down on the stem to take any play out of the system.
Line up the stem so that the bars are straight.
Slowly tighten the center cap bolt until you feel resistance, then give it 1/8 turn more.
Check the bar alignment again. Line them up, then tighten the stem steerer clamp bolts the same way that you did the center cap.
Hold your front brake full on and with your hands on the drops try and rock the bike back and forth. There should be no play in the headset.
Pick the front wheel off of the ground by the bars and swing it back and forth from right to left and feel for any tightness. It should swing freely. If it doesn't, start over and give the center cap bolt 1/16 turn instead.
No rock, no play, no tighness, bars lined up? Tighten the stem steerer clamp bolts to spec. If you don't have a torque wrench, tighten them snug with a standard key. Try and give the center cap bolt another 1/16 turn, but it should be snug already.
That's about 100 too many words for an operation that takes about 60 seconds.