Getting to Chile from Uyuni, Bolivia, was simple: all we had to do was wake up at 3 AM, carry our bags down four flights of stairs, find a taxi (nonexistent at the wee hours of the morning), and travel across town to the bus station, which isn't really a bus station but just an abritrary street corner where a cross-border bus may or may not depart at 4 AM.
Simple.
We arrived at the Bolivian border at 7 AM - just in time for the 8:30 AM border opening, allowing us 90 minutes to use the bathroom and purchase a breakfast of either potato-and-beef stew or vanilla wafers. (We chose wafers.)
The Bolivian border guards laughed at us for paying nearly $1,000 to visit their country - always a pleasant way to say goodbye.
We then crossed into Chile on our Israeli passports, allowing us to eventually enter Argentina on Israeli passports and avoid the $135 "revenge visa" fee they inflict on Americans.