3. Ditch your old shower head for an upgrade
Materials needed: New shower head, sealant tape, wrench (possibly)
Approximate time: 15 minutes
A new shower head will change your life. You know those really crappy, ubiquitous shower heads that spray a powerful stream onto your ceiling, your shower curtain, your foot, and sometimes your body? They suck. Upgrade to an adjustable seven-setting massager, and never look back. Worried about installation? Don't be. You just unscrew the old one, throw on some pipe thread tape, and screw on the new one. The results aren't unlike a Pantene Pro-V commercial.
4. Install a tap light, never stub your toe again
Materials needed: Tap light, common sense
Approximate time: Three seconds
Throw an inexpensive tap light up in a dark hallway (or closet) and never again wake up your roommates/significant other when you stub your toe and start sobbing uncontrollably. No tools required, just some batteries and common sense.
5. Hanging strips > nails
Materials needed: Hanging strips
Approximate time: One to two minutes
Use hanging strips instead of nails. Hanging strips are great tools for throwing up a couple of pictures here and there and won't leave any mess behind. Seriously, they won't even pull off the paint when you have to remove them. Peel, stick, hang, high-five.