Read Psalms 77:11&12  Sometimes when we are having a bad day or when we are in trouble, it is easy to forget that God will take care of us.  When our troubles are right there in front of us, we forget how God has taken care of us before.   That is why David reminds himself in these verses to remember the works of the Lord.  David knew that we need to remember that God has taken care of us in the past, and He will take care of us in this trouble as well.  That is why we can trust in God.  That is why we must remember.  If God has taken care of us in the past, and if we remember that He has, we will not worry when trouble comes again.  God will take care of us again, just like He has done many times before.  Then in verse 12 David reminds himself to meditate on the works of God.  Meditate means to think about it.  Meditate means to keep on thinking about the wonderful things that God has done for us.  It's like this: If God has taken care of us in the past - and He has, and God loves us so much - and He does, then He will take care of the trouble that we are in today - and He will!  Our job is to remember God's care and goodness!