Hi there: If you've been following this blog for any period of time you're aware that I'm all about providing you with the best return on investment. I want you to realize the best results with minimal investment in time, finances, sweat or any other sacrifice you may have to make. But this isn't about seeking out the 'magic bullet' so no hard work has to be done ever again. Instead it's about finding ways to get in sync with your body and its environment so every effort results in forward momentum.And along the lines of forward effort and forward momentum there are times when we may slip back slightly. Think of the progress you make as the peaks you climb and the setbacks as being the valleys you fall into.Now here's the trick.You don't want your peaks to be too steep or your valleys too low. Notice I referred to the peaks in terms of steepness rather than height. I'll explain more about why height may be more crucial than steepness in a moment. But first consider the following.If you think of the expressions we have for when things are working well for us we refer to 'smooth sailing' or 'everything is on track'. On the other hand when we are having troubles we consider this a 'shipwreck' or 'off the tracks'.Let's look at how your rest, nutrition and training apply to the concept of peaks and valleys.Rest - We know that the body needs around 8 hours of sleep a night. And if we deviate up or down from this number significantly we run into problems. For example we can't stay in bed for days on end to make up a sleep debt. And we can't get by with 5 hours a night thinking we're fine. We need to...