If you need to shoot a tracking video, you don't need a fancy camera slider or dolly. You can do a makeshift version in 30 seconds with things in your home: a thick book and a towel.
Just lay the towel on a flat surface, put the book on it, and place your camera on the book. Start recording video and pull your towel slowly. The book acts as a stabiliser for the movement, according to Instructables user Paige Russell.
Russell's original method replaces the towel with some sort of powder -- corn flour, bicarbonate of soda, icing sugar, etc. But that's bound to be messy. The towel trick, suggested by a commenter at Petapixel, sounds much cleaner.