Be careful when you are riding a bike. If possible, wear a helmet. This is a good tip for anybody, actually, as helmets save lives. I don't always wear one when I ride in my neighborhood (perhaps I should), but I always wear one when I am riding in a park or far from a patch of grass. You never know when you could fall off and hurt yourself very badly.
Always look before you cross the road. I had a "moment" with this today. I guess I didn't really look because my R.A. was driving past and she said to me politely, "you know that those cars don't have to stop there." I thought I looked, but apparently I was distracted and went out in front of a car!
Try not to Jay-walk. Especially if there is a stoplight nearby that you can cross at.
If possible, try to get a car that has Automatic trasmission because it is easier to manuever (in my opinion anyway). There isn't so much to concentrate on as there is in a stick-shift. There's a lot more positions on a stick and you have to look down a lot more which takes your eyes off the road. I have an automatic (actually my dad's black 2000 Honda Civic) and it works great for me.
Smaller cars are easier to drive, but maybe that's just me.
Always have a map with you so you can know where you are going and so you have less chance of getting lost. Try to carry a cell phone as well (keep it charged) and have your emergency numbers on your phone-except maybe not 911 so you don't accidentally dial it! Some cell phone companies also have a feature called ICE (an emergency number you can put in your phonebook on your phone). Also there is a number in the US called *77 (I think that's right anyway), which is another emergency number for people who are feeling threatened. This is good genral info for anybody.
Also, if you are out walking at night (girls especially) you should keep a watch out for people just parked in cars. Don't go near a parked car with a person who is sitting it.
Don't be so sympathetic to men/women who ask you for "help into their car." Ted Bundy, the serial killer was a smart, handsome man who carried a cane and often asked women for "help into his car" and that's when he abducted them.
Be wary of unmarked police cars and call emergency services as soon as you can if you spot one. These are often driven by people who are "bad apples" for lack of a better term.
Girls and women are often seen parked in their cars reading or doing some sort of thing like balancing their checkbooks. This is the perfect way for a guy to come and abduct you. You are not paying attention. You don't see them because your head is down or you are sleeping. Don't do it.
If you hear a baby crying on a doorstep next door, DON'T go over and try to get him/her. There have been reports of people recording baby cries in order to capture women. Call the police to make sure that it's not a real baby. If it is then they will help the baby, if it isn't then you will be safer than if you went over to help yourself.
Finally, if a robber is chasing you, run (preferably in a zig-zag pattern). He/she is less likely to hit you with a bullet or even catch you if you are on the run. If he/she is interested in your purse, throw it far away from yourself and then run. Chances are, if he/she has your purse, they won't care about chasing you. Sure there probably are a lot of valuable things in your purse, but most of them you can get back somehow, especially if you report it to the police. You can't get you back or replace you. Be safe and street smart. I will try to post more of these tips later. They were in the bathroom stall of my dorm.
Oh yeah, don't wear your headphones when you are walking at night because you won't be able to hear cars, predators, robbers, etc. as well. It's much safer to be walking without the music for a while than to be sorry.