The principle behind making millions is pretty simple: create something which is valuable to many people. Then there are three main ways of getting rich: 1) Enough people are willing to pay for your service/product; 2) Your service/product can be an asset for a bigger company, and they are willing to acquire you; 3) Your service/product creates such a large audience that you can leverage this by "selling" this audience to those who are looking for one. This can be advertisers (e.g. ads on your site) or a bigger company willing to buy this audience (e.g. Newscorps with MySpace). Why aren't we all getting rich? Because you need a decent idea for something that creates value, and excellent execution and marketing because competition, especially on the Web, is fierce. It's easy to know that you need to create value - a solution to a problem or need - but it's much less common to come up with a company which can readily do that.

if you want millions, pick a job that pays well in a large company and work your arse off 60-70 h/wk. seriously. good lawyers, accountants, finance etc, lots/most of them will end up with net worths >1M by the time they're in their 40's-50's. if you want to work on interesting things, money may well be a logical outcome but it's probably not your primary incentive. advice is worth what you pay for it but if you're entrepreneurial because you think it's the fast lane to cash, you might want to analyse your reasoning.