After 37 years of driving I still find paying attention (all the time) to be the biggest challenge to getting anywhere safely. So I paly a game - Spot the Distracted Driver. This keeps me observing the other vehicles in my proximity, looking for lane drift, speed variation, inability to keep a reasonable & consistant distance from other vehicles. It also keeps me critical of my own performance.
Congratulations on getting your license and enjoy your new found freedom!