My Top-10 Personal Investing Tips Â« Marshall Books By About Cash Flow Editor | 28 March, 2011 - 11:03 pm |3 March, 2013 Personal Finance My Top-10 Personal Investing Tips. By marshallbooks. I have been investing since the early 1980 and have developed some pretty strong notions about what works and what doesn’t. Here are my Top-10 tips: 1. Start in twenties. … More: continued here Bookmark the permalink.