Lost in the wilderness? Did you forget your emergency personal beacon (EPERB)? Learn from the BBC how to start a signal fire using your car battery and a piece of wire wool. Let's just hope you have a car . . .
Want to master Microsoft Excel and take your work-from-home job prospects to the next level? Jump-start your career with our Premium A-to-Z Microsoft Excel Training Bundle from the new Gadget Hacks Shop and get lifetime access to more than 40 hours of Basic to Advanced instruction on functions, formula, tools, and more.