we must also ensure that the use of any method for achieving success is appropriate to the time in which we live since some methods are outdated ( such as the production , sale and use of horse drawn carriages as a means of common transportation for the masses in the u.s. ) , some are for our current time but may become outdated ( such as the production , sale and use of gas powered vehicles ) and other ways to acquire wealth are timeless ( such as investing in real estate and the growth , sale and use of various types of foods ) .