What are some of the sales, marketing and distribution strategies for a small company and what are the methods to reduce the ratio of sales to marketing expenditure?

I havent really started researching this yet, so bare with me. I'm building an online service that focuses on real estate investors and other real estate professionals that need he …

What are the best industry practice for small businesses to allocate limited budget for marketing, advertising and promotion and how to get maximum return on this expenditure?