Obedience above all.

15 Samuel said to Saul, “I am the one the Lord sent to anoint you king over his people Israel; so listen now to the message from the Lord. ² This is what the Lord Almighty says: ‘I will punish the Amalekites for what they did to Israel when they waylaid them as they came up from Egypt. ³ Now go, attack the Amalekites and totally destroy^[a] all that belongs to them. Do not spare them; put to death men and women, children and infants, cattle and sheep, camels and donkeys.’”

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⁷ Then Saul attacked the Amalekites all the way from Havilah to Shur, near the eastern border of Egypt. ⁸ He took Agag king of the Amalekites alive, and all his people he totally destroyed with the sword. ⁹ But Saul and the army spared Agag and the best of the sheep and cattle, the fat calves^[b] and lambs—everything that was good. These they were unwilling to destroy completely, but everything that was despised and weak they totally destroyed.

What good is there if we do not obey His commands? Even though our intentions are good, we act good in the wrong time and circumstance is the wrong thing. Just like Saul, God called him to destroy everything, put to death EVERYTHING. and EVERYTHING is absolute. Saul thought he was innovative and decided to change God's commands. Instead of destroying everything, he kept the best of the life-stock and prepared to offer to God. What is better to offer offerings to God or to obey Him? That is the crucial question, there is a time for everything a season for everything under heaven. This pretty much summarizes everything:

“Does the Lord delight in burnt offerings and sacrifices
    as much as in obeying the Lord?
To obey is better than sacrifice,
    and to heed is better than the fat of rams.
²³ For rebellion is like the sin of divination,
    and arrogance like the evil of idolatry.
Because you have rejected the word of the Lord,
    he has rejected you as king.”

Obey. Obey. Obey. But today obedience carry an additional dimension, Jesus Christ. We build a relationship with Him on top of obedience. That is crucial.

One good example is that guys seeking out for partners, God wants us to "be fruitful and multiply", but the key is 

Remember your Creator in the days of your youth, before the days of trouble come and the years approach when you will say, "I find no pleasure in them"

Remember your creator in the days of your youth really tells us that we should concentrate on Him and build on our relationship with Him before everything else. That is Key. Obedience over all, above all.