Clinical reasoning skills can be strengthened at any age and at any experience level. Here's advice for both the recent graduate and the experienced practitioner.
Do you remember learning to ride a bicycle? You were taught to lift your leg over the bike to get on it, and then how to sit on the seat. Next, you learned where to place your hands on the handle bars. Finally, you learned that when you pushed your right foot down on one pedal, your left foot would come up on the other. Then you would repeat with the left foot, and off you'd go.
If you ride a bike now, you simply get on and go. You automatically know what to do.
What does this have to do with clinical reasoning skills? Actually, quite a lot.