However I've had to start university work again, and the concept of doing everything at home has made me feel a bit lethargic as I sit thinking "I'm meant to be working on my assignments" whereas in fact I am ahead of where I need to be by a fair way.
I can empathise with this, I did my Masters via Distance Learning and studying at home, after work slowly sapped any motivation I had for just about anything including the uni work, so I'd end up sat staring a screen unable to move forwards but compelled not to stop trying.
However my partner would semi-regularly come in, tell me I was clearly not accomplishing anything and suggest that I should do something more hands-on to get the "accomplished something" buzz in my brain, and get back on track (She has a knack for identifying small things that need doing anyway, which are a gateway to me being more motivated, which helps).
It's actually stuck with me as a technique for maintaining motivation whilst home-working, and I'll often do a little job in the shed for 30-40 mins over my lunch-hour if i'm struggling for motivation with my work; I was pleasantly surprised to learn that two of my colleagues both do the same (one was building a deck, and the other re-building a lister gas-engine) and find it helps too.
I'm halfway through making a box, which has dovetails, which I dread with a passion. I have also made a massive pig's ear of virtually every piece of wood that's meant to make the damned thing so I know it'll look absolutely terrible at the end. Now part of me thinks "it doesn't matter, just finish it and it's good practice."
This is a bit of a bigger mental block, but doesn't need to be.
When I started out as a researcher some years ago, I would beat myself up if every experiment I ran didn't go perfectly, and a lot of them didn't. So one day I meet with my supervisor to discuss this and after listening for a bit he shoves a pack of his dubious Russian cigarettes in my direction, and comes out with:
[the following is best read in a strong Ukrainian accent for full effect]
"Eto Pizdetz!
What are you talking? You're one of best students I have since moving here.
Give choice, You only ever work on hard problem! Naturally you have bigger struggle than anyone else in lab, but you fix for yourself and always learn from mistake... That's better than post-doc is!
Now. Smoke, Coffee and when your mind adjust to what you hear now, we talk about how you write this up."
That
completely changed my mindset about most things going forwards.
I stopped striving to always achieve perfection in what I was doing in that moment, and instead became determined to ensure that I squeezed every last drop of possible learning from each challenge, each mistake and every failure.
Ironically I approach "perfection" much more often now that I don't care about achieving perfection, but am inescapably driven to ensure I'm learning from everything I do.
So going back to your box...
Yeah, it might not turn out like you'd like, and yeah, it sucks when that happens.
But why are you making a box at all?
Given you can buy them so cheaply from [insert retailer of choice] it can't be just to have one.
So I'm going to guess that its for the pleasure of making things, and to get better at making things, so you can make more things, which give you fresh challenge, so you can continue to enjoy that pleasure of making things without getting bored...
In that case, each of the things that you feel went wrong are a thing to learn from (which you may have to remind yourself is a Good Thing™), and a concrete reminder that you've taken another step towards being better than you've ever been before at that skill (GO YOU!).
Compare the first dovetail you cut on the box so far, to the last, and I suspect you'll be able to pick out things that have improved significantly, and maybe areas where you feel like you got a bit less good (because you were tired, or focusing on getting something else right, etc.) Build another box and compare it to the first one, and you'll likely be able to do the same again, and so on...
I'm horrified by examples of some of the really early woodwork I did, but in hindsight a lot of it is also significantly better than I thought it was at the time.