I was trained in Full Contact for 7 years, kick boxing for 4 years, Kung Fu Wai Kung Pai 3 years, WT 1 year, Judo 4 years, Box 2. On 2003 I had an accident that practiaclly ruined my efforts, but I still have the knowledge (some idiot tried to rob me a week ago)
Remember a few basics in self defense
1. Your life is precious protect it by any means neccesary
2. Weak points. Even the stronger opponent has them, the most direct ones are on a line from the throat to the genitals. Easier to find are throat, chest just below the esternon, and genitals.
3. Knees, a proper kick applied on a kneee will lower any oponent.
4. Do not oppose force if you are not stronger, if you are grabbed and pushed, pull from his arm, if you are pulled push him
5. Balance, always keeps yours, make your opponent loose his, it is easier than you think, non experience figthers tend to move in a straight line towards you to attak, dodge to the sides, same principle can be applied if grabbed.
6. If attacked by more than one opponent, keep moving so they cannot attack you from different angles at the same time. Putting a wall on your back is not a good option (despite what movies say) it cuts any retreat chance you may have.
7. Normally a robbery starts with someone grabbing you. do not hesitate and hit first.
GOLDEN RULES
1. YOU ARE NOT FASTER THAN A BULLET DO NOT ENGAGE AN OPPONENT ARMED WITH A FIRE ARM UNLESS YOU HAVE NO CHOICE
2. IF IN DOUBT HIT HIS KNEE