[header] How to find great companies to invest in [title] Stay within your circle of competence. [step] If you have a field of expertise, you may be best able to identify quality within that area. Experience can provide you with the insights you need to make more informed choices. 
For example, if you work in retail, you may be better positioned to determine if you should invest in companies like walmart, target, or best buy, than you are in evaluating the latest bio-tech company. [substeps] Having competence in a certain area doesn't have to come from workplace experience.