I write next actions but they stay on my list because I don't know how to do them. Or they generate too many other additional thoughts that overwhelm me.

For example, one on my list is - Send Richard the stakeholder engagement plan.
But when I look at it I think - where is the plan? In my email? or is it in my H drive? Did I save it into the document management system? Maybe I should do that while I'm at it? Did I put a copy into the hardcopy filing system and on P drive? And what about the other supporting documents that go with that?

And then I think - I really can't be bothered thinking about this, it's stressing me out.
But almost every other next action I have is like this or worse (I did pick an easy one) so I'm very stressed out at the moment.

Yes, there really are 5 different places to store things.
So how can I setup my next actions so they are better? Should I have had a different next action in the first place (eg - look for stakeholder engagement plan and file)
Should I go as detailed as 'file stakeholder engagment plan on document management system?' or just 'file stakeholder engagment plan on all systems' or just do the filing as I complete each next action?