In the olden days, like thousands and thousands of years ago, you would save a document and never find it again. I used to spend a lot of time split between PCs and Macs and regularly I would struggle to understand where something had been saved. (Especially with downloads: where the hell did they go?) More recently, we've had Spotlight on Macs and Windows Something on Windows 7 that mean you can find anything you like pretty instantly.

I know the Spotlight stuff the best: I regularly use it to search for, say, the word “invoice” and tell it that I want to see only Word documents created between April 2012 and March 2013. (Can you guess what I was doing there?) Wallop, there they all are.

That one feature, which so many people simply do not know is right there on their 'puters, has undone two decades of how I work. And it's undone it for the better. I no longer spend time creating chains of folders so that I can find, say, all Acme invoices done for copywriting in February 2013. I just save all my invoices in one place and they're waiting for me. If I want a particular one, Spotlight finds it. If I need to compile something about them all, I just open that one folder.

I think that's probably saved me a gigantic amount of time and effort. So much so that I'm very glad I listened when I was told about it, I'm certain that I have no need for any other solution – but I am also willing to listen again if you've got something better.

And people are saying they have something better. Hand on heart, I do not know. And I have ignored it for years. But now this thing is built in to the OS X Mavericks that I use most days and it's right there. Doesn't make me use it. Doesn't require me to do anything. I can continue ignoring it. But it looks at me. It looks. Like that, that's what it looks like. And all the time I'm hearing people talk about how great this thing is. They say it's so great that it is about bleedin' time that Apple added it.

It is tags.

If I save that Acme invoice, I already have a habit now of calling it by a fairly descriptive name so that I can see what it is right away whenever I open the invoices folder. I stole this idea from David Sparks and his extremely good Paperless book wherein I learnt to name files like this: “2014-01-10 Acme invoice DRI0001”. (To just nip off the subject of tags for a second, because this has proved so useful, Sparks also recommends using TextExpander to put that date in. So I go to save and instead of checking the date, I type the letters “;df” with the semi-colon and without the quote marks, and TextExpander pops in today's date for me. If, as usual, I'm playing catch up, I will then change that date but it's still faster. Now, carry on.)

So I've got Spotlight, I've got this descriptive filenaming system which without my doing anything is always sorted into date order. I don't know that I need anything else.

But still there are tags.

If I save my invoice “2014-01-10 Acme invoice DRI0001”“ then before I hit the actual Save button, I can type in some tags. I can type a row of words like invoice, Acme, copywriting, difficult client, bad day, don't do this again, paid really well, used the word purple, invoiced, not paid yet. And on and on and on. I can type these, they are tags, and so far I have never done it.

Except I guess that's a lie. Tags are new to OS X Mavericks – they're already in Windows, at least since Vista, and that would be great except I read Microsoft's advice on how to use tags and I glaze myself over – but they've been in other things. There are tags in Evernote. And I have used them there.

Just inconsistently.

Hang on. Let me check. How do you check how many tags you've used in Evernote?

Apparently it's 316.

I truly do not remember typing more than one. I remember typing 'recipe'. And I remember that because I spent some time thinking, have I already typed 'recipes'? It turns out I had. So now I have two and I don't know which to use when I search for a recipe. Instead, I just go to my Food notebook or I use Evernote Food. Or I use Paprika, an entirely different recipe app altogether. ("An entirely different recipe app.”)

I told you I don't know. Hand on heart, I said. Are tags any use to me? If they're not, why have I written 316 of them in Evernote? If they are, why have written zero in OS X Mavericks?

I can tell you one reason for that: if you create a tag in OS X Mavericks then every folder you open includes that tag in a list on the side. Brilliant: tap or click on that tag and you only see the files that have it. Tap or click on several tags and you'll see all those files that have both. So with a couple of clicks I could see all invoices sent to the bad client who pays well. But I have 316 tags in Evernote, if I did that in OS X Mavericks, how long would the list of them be? It would be 316 long and by the time I've scrolled through, I could've found the documents.

Oh.

Consider this a live blog.

Because right now, this moment, exactly as I reached for an example to tell you and then wrote it out, I've just changed my mind.

I do think having 316 tags listed out on the screen is ugly and a chore to read through, but I do suddenly see that being able to pick out invoices from a bad client who pays well is something that I would like. And it is something I would use.

I may have to look into tags a bit more, then. I was telling you all this by way of showing that time spent knowing how you can find things on your computer will help you save a lot more time later. And recently I seem to have been in many conversations with fellow writers who complain they can't find anything. But now I'm thinking I should spend that time myself to understand more about tags.

Thanks.

Also, I was telling you this in order to then point you at someone who knows what they're talking about or at least doesn't write to you until they know what they're talking about. That won't catch on. But here's a particularly interesting take on it all from Lifehacker: I've Been Using Tags All Wrong.