Nike and Bhagavad Gita

How do we go about doing some task ? What should be the intensity, energy,passion, focus that we need to devote ? Some say that it depends on the task at hand. So, if it happens to be a routine chore, you need not give so much attention while for other non-routine more challenging tasks, we need to devote our mind and energy while for certain other things which are close to our heart, there is an extra element of added passion. What does the Bhagavad Gita have to say on this topic. To put it in short, its exactly what Nike, the Foot Apparel MNC says " Just Do it "..

Never try to overdo things, do not have excessive passion when doing something. Give some margin or allowance for things to go awry or out of control. In other words, our effort is only one of the inputs to the system and hence cannot entirely influence the output, the way we would want it to be.

Never under-do things just because, we do not get the expected results. So, we should not get depressed or dejected when results dont turn out as expected.

Be dispassionate, do things not because you like/dislike things, do things because its your duty.

So, if we dont overdo things or under-do things, , what's the IDEAL approach.. " Just do it.."..