Get away if you can. Hide if you can't get away. If you have a weapon, be prepared to use it if necessary. But don't wait in your bed for the predator to find you.
Injure your attacker so he can't attack you anymore.
Don't wait to learn how to defend yourself! Getting fit will definitely help, but learn techniques now to keep you safer.
Watch out for bad advice. Sometimes it's obvious. Other times?
Don't wear earphones in public. Be aware of your surroundings.
Make eye contact, keep your head up and be aware. Awareness can keep you from being attacked.
Self Defense isn't social. Don't say what you're going to do. Do it!
Even if the thug doesn't attack you, he can still steal your phone. Keep your phone in your pocket.
Beware Bad Advice... if you can reach their face, gouge out an eye or two. If there is absolutely nothing else you can do but scratch your attacker, by all means do it. Hopefully it'll give you an opportunity to be able to get into a position to injure your attacker.
Beware bad advice. It's all over the internet. Never open your doors to strangers.
Beware Bad Advice: Carry a defensive weapon if you want to. But make sure you know how to use it. And learn weapon retention, too.
Beware Bad Advice... it is NOT about DNA! It is about fighting back, striking hard and defending your life. Injure your attacker. Again and again. Until he can no longer hurt you.