Buy a bat (I have my old color guard rifle) or similar. Keep it in your room/near your bed.
Get a lock for your bedroom door.
If you’re moving into a new place, change the locks. Who knows who had a key to your place before you.
Keep your phone/a phone in your room.
Get a weather alert system set up. App, weather call, little weather radio that tells you about major weather events.
Wave at your neighbors. Take note of the ones that make you uneasy. Watch out for kids always.
Be nice to your mail person. No matter what.
If you choose to drink/etc alone, unplug your wifi router. You’ll thank me.
Have extra seating. People sit when they visit. Your one comfy chair is great for you. Not so great for you + grandma + ur five cousins, your aunt, and a couple others.
When you take a shower, bring your phone to the bathroom in case you fall your phone is no longer halfway across the house, it’s just on your counter