Taking God into account

Psalm 127:1 NIV

Unless the Lord builds the house, the builders labor in vain. Unless the Lord watches over the city, the guards stand watch in vain.

Planning is good. There are many adages and proverbs that go with planning and encourage thinking ahead. One of the most common is: if you fail to plan, you are planning to fail. Another one close to it, usually attributed to the Bible in error, is that: Heaven helps those who help themselves. The world's system encourages inward thinking: how do I put structures, systems and values in place which will help me towards the fulfillment of my plans? Most times, these plans are laid and finalised without any input from God, the maker of all things and the only one who can guarantee tomorrow for anyone.
How, then, do we go on from here? Why plan, if God knows tomorrow? Why bother with tomorrow if it is not assured, and why not just live from day-to-day, hoping that someday, we will get to the eventual destination God had planned ahead for us?
I believe the verses above hold some truths for us: God's promise of success does not exclude your own part in the whole phase- your own preparation. What will not work is you putting the cart before the horse: putting your plans in place and expecting God to approve them. If I trust God to protect me, and I build a house without windows and doors, then I invite robbers to prove my foolishness. If I deliberately consume unhealthy food, while trusting that God has assured my healing, then I put God to the test and I ask him to approve even my deliberate errors of judgement even with my full knowledge of what is right and wrong.
But when I have put God first in my thoughts, plans and structures, everything else that I do is guided by Him and approved by Him. I put security in place in my home,but with the full assurance of faith that he alone is the protector. I read and study hard for exams, because I know he will crown my efforts with success.
But there's something else; another reason why God must come into the picture: he does not do his own things the way you expect. Robbers can still come in, exams could still be failed and things may not go according to plan. He remains God all the same. His plans are never wrong, because whatever he does now or allows now is done with the end in view.
I must trust his wisdom, knowlege and power. I must depend solely on Him to work out his will the way he sees best. He owns my life and holds its end in view so I must allow him work out his will the way he sees fit. It may not always look nice initially but it always ends well.
His time of favour is here.