OP:
I'm not sure if someone mentioned it already, but you'll want to check out focus blending or focus stacking. It's one of the most common techniques used in macro photography and many different photo editing softwares have helpful automated options for it.
It's also important to have a workflow set up to streamline your photos and the editing process. I personally use Lightroom to import photos, sort & catalogue them, and give them the first round of editing. A good plugin/software to use is the Nik collection, which is now apparently free (and I have paid for it, aaargh). If I need to go deeper or want to achieve a certain effect, then Photoshop comes into play. Those two interact with each other quite nicely.
Basically it boils down to knowing your tools well, their strengths and weaknesses. That is valid regardless of the camera or the software. I did architectural photography for a living and I can tell you that you shouldn't delve too deep into high tech super awesome cameras, lenses and toys, but rather into how to compose your photo, what effect you want to achieve, what you want to say with that particular picture. Sometimes it leads you from what you had envisioned into something completely different and awesome, so be prepared to experiment a lot and find something you're comfortable with. What also helps a lot is to try and recreate photos you've seen and that impressed you. That's how you get valuable insights about lighting and composition. It also gets you to think critically about a picture and you're forced to analyze it instead of just looking at it.
Having said that, I have never once taken out my bigger cameras to take a photo of one of my watches.
Somehow I couldn't be bothered, or should I say... I couldn't bother my wife with me playing around with cameras and watches for a few weeks.
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