Every day "whatever" meditating:
"whatever things are true - whatever things are noble
whatever things are just - whatever things are pure
whatever things are lovely - whatever things are of good report
if there is any virtue - if there is anything praiseworthy
meditate on these things," Philippians 4'8.
Meditating requires focusing, because of the danger of slipping into thinking about problems and negative things. Also, this can easily turn to serious worrying.
Jesus told His disciples "not to meditate beforehand on what you will answer," Luke 21'14. He was referring to the likelihood of them experiencing future persecutions.
It's okay to have concerns - but not have worry.