Effective preparedness can be simple, but it has to be rooted in an honest and systematic review of the risks you are likely to face. Plenty of excited newcomers begin by shopping for ballistic vests and night vision goggles; they would be better served by grabbing a fire extinguisher, some bottled water, and then putting the rest of their money in a rainy-day fund.
To get it right, make a list of all your emergency gear, along with expiration dates where applicable. Next, go through the list marking all the "stays home" stuff - the supplies that are impractical to haul around or not particularly essential when evacuating. Make sure that all the tactical gear - such as flashlights, fire extinguishers, first-aid kits, and self-defense weapons - are in a logical and easily reached place. For the remaining "stay home" items, just find an unobtrusive location, stow them away, and write the spot down in your spreadsheet.
Bare hands. No deterrent effect, but surprisingly effective when a confrontation can't be avoided - especially when facing a single assailant. Reserved for people who are physically fit and willing to invest a fair amount of time into training. One of the most pragmatic and widely-taught schools is Krav Maga, and there's certainly no harm in checking it out.