Some things to worry about

In no particular order...just off the top of my head
Bird Flu (thanks to the FT magazine this weekend for reawakening this one)
Mega volocano erupts on west coast of America (nice BBC program on volcanoes last week!)
Mega volcano erupts in meditteranean (ditto)
Global warming (seems to be happening)
Sea level rise (bound to happen if there is global warming so I'm happy to live on a hill)
Political instability when everyone is forced to stop working for the UK government, as we all seem to do either directly or indirectly!
Cashflow (immediate)
Cashflow (medium term)
Children (your own)
Children (other people's ...and their impact on your own children)
The state of society in general (respect, manners etc)
Care of the elderly (or lack of)
Schools (level of attainment, expectations and the differences between public and private schools)
Pets
Traffic (and the likihood of traffic, pets and children colliding in some form at any point in the future)
Crime
Terrorists
Lack of oil
Lack of water
The state of your car
The condition of your house (winter is coming)
Fuel prices (petrol, gas, electric)
Leaking gutters
Leaking bathroom roof
Lack of curtain rail in child's bedroom
Politicians (general ineptitude and appearance of their distance from reality)
Benefits culture and overdependence on handouts
Political correctness, and why it hasn't helped anyone
Inexplicable legislation and enforcers thereof - ref those who are about to be fined for not using their recycling wheelie bins enough
Wheelie bin collection dates (hence worrying about fine)
After school activity timetabling
Cleaning (no time)
Shopping (no time)
Health of parents
Prospects for business growth
Lack of spare time
What to feed the family today
What to put in a packed lunch for tomorrow
Upcoming social events
Parent with imminent hospital diagnostic tests (and their results)
Side effects of medicines (prescribed to said parent)
Fitting in work when there are so many other things to think about