I bought a Dahon Boardwalk S1 earlier this week from a local bike shop. I haven't been on a bike in 7 years. I used to ride my mountain bike all the time, but it was always a struggle to get it on the bike rack and riding around the neighborhood got boring. The Dahon Boardwalk was the right price for my first folding bike, and it fits into the back of my Honda Fit without even folding the rear seats down!
The first two days I just rode the Dahon up and down the street a few times to get my bike legs back without making my over-50 self crippled. Today I took it for a mile ride along my neighborhood sidewalks, which required many turns. I felt like a kid learning to balance while steering again! I tried making a sharp right turn and ended up missing the sidewalk and getting stuck in grass.

Fortunately, no one can recognize me with my helmet and sunglasses on.
Is there a trick to steering, or do I just need more practice? Maybe I was too tense? Any advice?