When dealing with 'sudo' level commands, always remember the following:

"When in doubt, DONT!"

No real favourite method, however that being said the most useful little bugger in PHP when having to deal with badly documented libraries had to be 'get_class_methods( ___ )'

Upon every mention of the term SCRUM my mind is instantly pulled off topic onto rugby... damn you homonyms..

Spent a bunch of time the other day trying to figure out why my system somehow no longer had php-curl extension on it... post investigation i realised my terminal that was open was on my host system rather than the vm i operate in.
Ao i stood up and went to make mote coffee as it was clearly required.

The feeling of sitting through an hour debrief after a project was delayed due to added functuonality which fell completely out of the original scope was added and the PM on the project is sitting on fb with their phone the entire time.

When you pick up a codebase from 4 years ago of utter dissaray and static/hard coded in nature.
Then later meet said original developer presenting at a conference on re-useable code.

There is a feeling akin to meeting someone whom you have seen naked...

You havent lived as a dev until you develop that nervous twitch of ctrl+s spamming.

Client: we want X.
Dev: Quote for X.
Client: We only want to pay x.
Dev: Requote for x.
Client: approved x.
Dev: Deliver x.
Client: where is X we asked for X.

... perspective of project scope matters.