If you're reading this, my hunch is you know that, when it comes to saving for a comfy retirement, the stock market is the place to be. For all its ups and downs (you know, like the one we lived through on Tuesday), no other investment vehicle provides a bigger bang for your long-term bucks. Indeed, if over the next 20 years the market returns its historical average (10.5%), a $4,000 annual investment (the IRA contribution limit for tax year 2006) will grow to more than $240,000.

Rev up your returns
With Tuesday's sell-off, however, Mr. Market handed savvy investors a choice opportunity to do even better (although there could be some further volatility along the way). For example, growth-oriented concerns such as Corning (NYSE:GLW) and Broadcom (NASDAQ:BRCM) -- both of which boast double-digit earnings growth forecasts for the next five years -- are now roughly 30% below their respective 52-week highs.

Advanced Micro Devices (NYSE:AMD) and BJ Services (NYSE:BJS) are also well off their yearly peaks, and while Caterpillar (NYSE:CAT) and Sallie Mae (NYSE:SLM) haven't fared quite as poorly, these long-haul overachievers still sport P/Es lower than that of their average industry rival.

The upshot? Now's a fine time to be an investor of the cheapskate persuasion. As I explained on "Add It Up" -- the blog that comes gratis with the Motley Fool Green Light service -- when it's a solid company you're talking about, even cheaper is even better.

And that's true in more ways than one
In addition to investing your way to retirement riches, savvy types will want to save their way there, too. Spend less and you can invest more, after all, and again my hunch is that you're probably aware of areas where a little, um, skinflintiness could go a long way. Am I right? Thought so, and for the record, me too.

Thing is, there are likely areas of potential savings that you might not be aware of. You should regard the interest you pay on credit card balances as negotiable, for example, and there are whip-smart shopping strategies that can help you save big bucks on everything from kitchen appliances to movie tickets. Indeed, in the November 2006 issue of Motley Fool Green Light, my co-Fool, Dayana Yochim, checked in with a feature designed to help members "Buy Everything for Less" (free trial required).

The Foolish bottom line
If you'd like to begin the process of bringing the saving and investing aspects of your financial life together, I encourage you to give Motley Fool Green Light a risk-free spin. A completely free 30-day guest pass is yours for the taking.

There's no obligation to subscribe, and in the issue we're prepping now, we drill down on retirement accounts and help members determine which kinds of investments are best suited for tax-favored vehicles -- just in time for IRA season!

Sound like news you could use this time of year? Good deal. Click here to give Motley Fool Green Light a go.

Shannon Zimmerman runs point on the Fool's Champion Funds newsletter service and co-advises Motley Fool Green Light with his pal Dayana Yochim. At the time of publication, he didn't own any of the securities mentioned above. You can check out the Fool's strict disclosure policy by clicking right here.