Sure, we should still be researching that too, but people have been trying that, and not with all that much success. What works and doesn't work tends to vary wildly from person to person, and at best people tend to find answers that let them scrape by, not answers that really fix the problem.
And I think it's quite possible that there isn't an organizational solution. It seems very likely to me that humans have evolved to basically be as lazy as we can get away with.
It makes sense as a survival strategy to put in exactly as much effort as it takes to get your basic needs met. For most of us throughout history, this meant working our asses off to subsist. Pushing ourselves further than that would be a dangerous gamble on our resources.
So in first world countries today, many people have this problem where we can subsist on relatively little effort, compared to, say, a farmer in 8000 BC. So our motivation scales down to that context. Send someone with that little motivation back to 8000 BC and ask them to start farming, and they'd starve - except that their motivation would probably rescale to fit the new context.
And yes, there are those who find motivation easy, who don't have these problems. But I think they are significant outliers.
So my point is that I'm not sure we can really ramp up our motivation without finding ways to stress ourselves the hell out. And I don't mean "this report is due tomorrow" stress, but "winter is in one month, and I don't want to die" stress.
I'd really rather have the pill that turns me into an outlier.