When you think about a problem over and over in your mind, that's called worry. When you think about God's Word over and over in your mind, that's meditation. If you know how to worry, you already know how to meditate!
"Your most profound and intimate experiences of worship will likely be in your darkest days - when your heart is broken, when you feel abandoned, when you're out of options, when the pain is great - and you turn to God alone." Rick Warren So True!
That is why He puts us through things. to sanctify us (set us apart), to mold us and grow us. Yeah, it's uncomfortable at times, but hey, He's going to use it for His glory if you let Him. I want to be used for the glory of God!