Ok, so far there are only a few replies (not surprising for a Sunday) but all are at least partly positive, so I'll go ahead. I don't make any promises at regular updates on this thread, I'l just post as and when the mood takes me, but you are all welcome to chip in.
So, we're gonna talk passive long-term investment. Let's start by explaining what that means exactly:
1) It's investment. That means that any kind of technical analysis, trading, chart-reading, big betting and so on is out; adding to losers (within reason), buy & hold, following valuation instead of price is in. Forget your trader side when discussing this subject. Investment requires either a decent lump-sum, or regular contributions from income until your portfolio becomes a decent lump sum. Almost all able-bodied adults in the developed world have the ability to earn enough to invest. Even $200 per month is enough to make a meaningful difference by retirement age. Investment is pretty democratic in this respect - almost all of you reading this can retire with $1 mill+ if you are young enough (if you are 60 and broke, it's probably not gonna happen), can work, and have some personal discipline.
2) It's passive. Due to the terrible record of the universe of active managers and individual investors who use discretion/market-timing, I am going to recommend a purely passive approach based on low-cost, tax efficient exchange-traded funds (ETFs). Passive invesment has many benefits: i) it requires no market insight at all, other than understanding basic invesment concepts (which you will once you read the full thread) ii) it is low cost - ETFs have lower fees than active funds iii) it is tax efficient, ETFs incur lower capital gains than active funds, and even passive funds pay more in tax usually iv) it performs well - index-tracking ETFs outperform most active managers, and almost all individual investors, over the long-run v) it is low stress, and simple to do.
3) It's long-term. The average person cannot get rich quickly by sensible investing. High returns require either lots of luck, lots of risk, or truly special abilities (e.g. Buffett, Soros). Much as we'd like to be like them, the odds are against it. The beauty of investing though, is that over a long enough time period, any Joe Sixpack can become pretty rich by most standards. Long-term investing is possibly the only way that an average working stiff can practically *guarantee* to retire a millionaire. Seriously, I can think of almost nothing in life that is such a great sure thing for the typical guy or gal in the street. All it takes is a little work, some discipline, some patience and consistency.
4) It's conservative. A well-constructed investment portfolio has almost zero chance of massive loss of capital. As an example, a model portfolio I use as a reference would have lost at most 15% during the 2000-2003 bear market, and that had 50% in stocks. It's performance from Oct 2007 to the March 2008 lows was down around 9%, compared to down 20% for the S&P. If you get enough diversification, and use enough low or negative correlation assets, then a portfolio can be surprisingly robust. Many people are wedded to the idea of S&P or bust - which is IMO way too risky for most people; or something like 70% S&P, 30% bonds, which is better, but still a lot more risky than is necessary. I'll explain how you can easily beat cash returns, without taking all that much risk - 10-15% is the most you should lose from peak to trough during even a fairly severe bear market. A once per century perfect storm like the Great Depression would be worse, but even then you would lose no way near as much, and would vastly outperform almost all other stock/bond portfolios.
So, that's a quick description of the approach I'm going to take: passive, conservative, long-term investment. Now let's get into the details...