There are many forms of spiritual/magical protection out there. Just about every ttadition out there has some method of empowerment, protection, and the banishment of negativity. And the options run through several methods from leaving charms and sigils to runes, protective items and herbs, and of course rituals.
-items that block out or remove negativity include witches balls (blown glass balls), dreamcatchers, small mirrors (mirrored coasters work well), and grounding or purifying crystals like obsidian, onyx, amethyst, apache tears, black kyanite etc. Take your pick and leave them out on areas you want to protect.
-barriers and thresholds can be drawn using lines of salt, black/raw iron, drawing runes, drawing a circle and empowering it around your residence, burying nails (points facing away), and planting or hanging certain herbs around the home.
-active cleansing and protection can be done to lay claim to your space, inclusing smudging the home with sage, sweetgrass, cedar, or raw fresh tobacco. Similarly you can do rites of protection to call on angels, your guides, or other protective entities to help protect the home.
-Also, actively working to make the home a naturally positive environment goes a long ways in blocking out negative action. Positive sayings and empowering images or art help. Images that make you smile, comforted, or even laugh when you see them are good to have out and visible. The more positive and loving the environment the more likely it is that the home will draw in other positive things.
-Humans are intensely powerful beings. We routinely create what we are looking for within the world around us. Just be careful of where you are placing your attention and comitting your energies and thoughts. If you are tiptoeing around, afraid of dark things and fearing that they will appear, then that fear will draw those very things. Be confident of your space. Look for sources of positivoty. Expect and allow only the things that are supportive of a safe and healing home. And act to bring those things in. The presence and comfort of positivity will push away negativity without having to give it even a stray thought.
I hope this helps, and of course if you are looking for help with specific things (like how to dmudge, specific rites, what kinds of crystals to get, etc) don't hesitate to ask.
