Good thing this is not a contest as to how many you can draw in 3 minutes. I draw the leaves first and I barely got 1 done and the timer went off. What a shocker! So with the 2nd and 3rd, I tried not think too much like you said. Definitely needs practice but it was fun though. And oops forgot to take include the objects in the shot.
These are 3 (of many) things that's sitting under my monitor.
1st object: small branch of dried leaves
2nd object: miniature weight (super cute that looks like a lantern that my Husband thought I might like)