To tackle (a problem or task).
To change from one tack to another. See Wikipedia:Tack (maneuver).
To busy oneself with.
To circulate (in).
To take upon oneself; to start, to embark on (a specific task etc.).
To commit oneself (to an obligation, activity etc.).
To pass a slower moving vehicle on the curbside rather than on the side closest to oncoming traffic.
The passing of slower traffic on the curbside rather than on the side closest to oncoming traffic.