Everything near me is a weapon. So long as they don't have a firearm I can fight back enough to get away. Keys, Pencil, pen, rock, stick, trash can, purse including straps, dice bag(pulls double duty as a sap and caltrops four sided dice hurt even through tennis shoes when at a run) . That doesn't include my purpose built weapons, a dagger, mace(spray) , Mace(bludgeoning weapon) , Sword, crossbow, bull whip, baseball bat, and maglight. I guess the last two aren't purpose built weapons, but they sure have the mass to do the job.
HTH training helps, as does the Korean gentleman who I spent time learning some neat "tricks" from during my time in South Korea. It's amazing how much you can do when hitting pressure points.
Do not do anything from earlier in my post unless you KNOW what you are doing, it can get you killed as easily as it can save you. I've already used one of those once in a real situation, several times in practice.