Uber’s extensive global network now covers everywhere from London and New York to Lima and New Delhi. Fares with UberX are 40 percent cheaper than a normal taxi, although beware of “surge” pricing that sees them go up during peak times. You can request more expensive UberXL (SUVs), Exec and Lux vehicles, as well as London black cabs (a recent addition). Business travelers can create an account attached to their corporate credit card (company policies can also be integrated). Receipts with journey maps, driver details, times and prices are e-mailed to all customers.