I have mention the work of Byron Katie and her 4 question process to questioning your stressful thoughts (see her website for details at thework.com). This 8 minute video gives an example of how her process work in regards to money. Specifically, the stressful thought is “you need more money, is it true?”
“Managing” our thoughts is one of the most challenging aspects in our “mental” world. Her work is a very structured way of dealing with the very unstructured and uncontrollable mind. Although we can’t keep our minds from thinking thoughts, learning to not believe everything we think is great way to more mental peace.