Mat 6:33 But seek ye first his kingdom, and his righteousness; and all these things shall be added unto you.
In context, if you actually look at the things being mentioned in the preceding verses Jesus is talking about food, drink, and clothing. He is not talking about Hummers, mansions, or Lear jets.
I take from this scripture that if we look after the things of God then He will look after our needs. In addition, if you think about it, being in the Kingdom of God, the Israelites received manna day after day whether they were good or bad. God takes care of his children, it is part of kingdom living.
However, there is more to this seeking God first business. When we meet the person Jesus, we develop a constant thirst to seek Him first! The first thought in the morning is about Jesus. When I wake up, the very first thing I do is listen to the bible while I am letting the caffeine sink in. A long time ago, seeking God first not only meant putting Him first in priority, but putting Him first upon waking.
I find that if I seek God and His ways of doing things right, that my day simply goes better. I walk in more favor, I do not have as much confusion throughout the day, and I am overall at peace.
This has become so much of a habit that if I ever skip the prayer bible reading-hearing session I actually think to myself "I am not putting God first today" and that is a somber revelation. If I actually put work, or anything or anyone else before Him then He is not first in my life.
If you are not seeking God first then you are not seeking God first.
Take the time to prayerfully meditate on the following verses. (Matthew 6:24-34)