I see a lot of rants about Project Managers (PMs). As someone who might work as that in the future, what are the some do's and don'ts for that role?

Make an Async task (Java) and...

DONT use a loop to iterate though a time series collection. Don't linear search that shit.

DO use a queue and pop() it like its hot. Check that shit to see when it needs to be used instead of searching.

DO assert that your time series data is in order (Predication mother fucker).

DO throw an exception that you data is all fucked when it's all fuck up.

Stay sexy and use a fucking queue man.

So I work at a small company and we are currently talking about introducing critical path analysis for our projects.
Are there any recommendations or tips/do's/don'ts that are good to know when starting with this??

On a side note: we use Jira in combination with Confluence so if there are any useful integrations with that possible please let me know. I already saw some interesting add-ons for it.