15. Arm Any Door With This Super Portable Alarm
Amazon
Think security systems are hard to install? Think again with the Doberman Security Portable Door Alarm. Just hang it over any doorknob and place the clip over the door before closing it. If anyone tries to enter without permission, it will sound an alarm loud enough to wake you and probably your neighbors.
16. Enlist a Few Guard Plants
gardnersdream.com
If you’re looking to add a bit of protection to your yard, consider planting roses or pyracantha (aka firethorn bushes). Not only are both plants beautiful, but they also have lots of thorns or prickly edges that make them less than ideal hiding spots.
