Like a headless chicken

with great haste and in careless and senseless manner

e.g
Instead of running around like headless chicken , make a list of things you need to finish and then work on them in that order

Expedite

Make an action or process happen more quicker or be accomplished more quickly

ex:
Can you advise how we get expedite this change ?

Catch someone off guard

To surprise someone by doing or saying something unexpected

Ex:
You just caught me off guard

Get one's finger in the air

go with the crowd,go with the flow

A person "putting his finger in the air" is unlikely to come up with original, individual ideas or solutions. And decisions are made unscientifically, without backing evidence.