Personal Security?

Personal Security?

I looked in the memories and didn't see anything on security. I am not really sure if its a "poor skill" or something meant for this community, but I was curious and wasn't sure if anyone can even help me... If this is not allowed, please delete.

I am currently living at home, but I am hoping to move soon to the city I was born. I used to live there with my mother in the worst part of town and before I moved back to where I am living now, I was assaulted by a drunk man. As far as I had heard, the crime rate has been going up dramatically and it was named one of the worst cities in Canada by Maclean's, a popular magazine in Canada. I am moving there to be closer to family, to go to school and because its cheap to live and I have no money.

I have no items that are of real value, most of my stuff just has sentimental value. Most of my furniture and the like are handed down or used, so I really don't care if someone were to take it, but I value myself. I know my family will help me and will be around a great deal of the time, but as a good example: my uncle went into a convenience store for a pack of smokes and my aunt stayed in the car. In the time between when he went in and came out, someone had attacked her (she mouthed off to a guy and he beat her up, especially in the face)...

Since I am going to be living alone and I walk everywhere, I was hoping for some suggestions for security. Preferably something cheap and effective for when I am alone, just in case something happens...

Edited:
Researching a little, I was kinda thinking of something like those personal Alarms: http://www.streetdefender.com/cgi-bin/catalog.pl?catalog=0 Has anyone tried something like this? I guess its supposed to draw attention to you and startle the attacker, but I was curious as to whether anyone has used one before? do they work at all?
A few lasts for this season.

A few lasts for this season.

Hydrangea help

Hydrangea help

The Hoya saga

The Hoya saga

The Rasberries are coming

The Rasberries are coming

hi! long while.. another ID

hi! long while.. another ID

Apartment of geekness

Apartment of geekness