I'm by no means new to cycling, but not hard core, maybe 1200 miles a year.
On the road the other day about 25 miles into a ride, my head was down(ish) and a guy rides up behind me and says 'weaving"..And I was.
So I started thinking about holding a straight line. When I ride with my eyes 50 yards ahead, no problem.
When i get tired and start chewing on the bars, I drift a few feet to the left.
Any good methods for holding a line.