What kinds of things were put in place to prevent another Stock Market Crash similar to the one of 1929?

This site should give you the answers you need.

http://en.wikipedia.org/wiki/Great_Depression#New_Deal_in_the_United_States

To prevent another Stock Market Crash similar to the one in 1929, several measures were put in place. One significant initiative was the implementation of the New Deal in the United States. The New Deal was a series of economic programs and reforms introduced by President Franklin D. Roosevelt in response to the Great Depression.

To find more detailed information about the measures put in place to prevent another stock market crash, you can visit the provided link: http://en.wikipedia.org/wiki/Great_Depression#New_Deal_in_the_United_States. This link will direct you to the relevant section of the Wikipedia page on the Great Depression, where you can learn about the specific actions taken during that time.