You should try carrying a small sketchbook. Then use a pen and challenge yourself to draw as much as possible. At least one 30 min session per day :) Draw ideas, doodles, observations, whatever as long as your drawing.
For the most Architectural Design firms, it was time to change from hand drawing to CAD planning in the and I used AutoCAD and since 7 years EliteCAD. But for the pre Design I still perform with hand sketches - best results within minutes