The jobs I find to be in the highest demand are those that are in the medical (including mental health) and technology sectors. The reality is that many jobs depend on the state of the economy, while these are not impacted as much. People will always be in need of medical care regardless of what is happening elsewhere in the world, and since technology is slowly taking over the world, there will always be a place for programmers, web designers and all other people in that field.
As you can tell from this list many of the fastest-growing jobs are in those industries. Securing a position within these sectors means you will be pretty safe for years to come.