Understand the airspace around you
Even what you might consider a minor intrusion into controlled airspace not only threatens safety but can cause hundreds of thousands of pounds worth of delays to airline traffic….so is a bit of a big deal!
Learning how to effectively make use of the available resources out there, such as the accuracy and ease of GPS, and the humble listening squawk is part and parcel of training, but it all means nothing if you don’t understand the basics of airspace around you.
This PDF explains and gives examples of the different types of airspace you will inevitably negotiate at some point during your flight training and beyond.