It can be much bigger things as well. If something major happens in your life, it essentially creates a shadow of negativity that overshadows any type of positive thing in your life, like a sort of storm cloud that blocks out any sun rays.
When I’ve had a bad day, I know for a fact that the only thing I’ll want to do is get into my pajamas, watch Netflix and sleep until things are okay again. But I also know that that is not something I can possibly do - especially not with my GCSE’s coming up.
I could flop into bed and stay there for the rest of the day, but I can’t. I have to force myself to do things, which seems really crappy and tiring at the time - but I feel a lot better once I’ve done it. This is because a) it’s done, I don’t have to worry about it and I can watch TV without putting it off and b) I’ve done something productive, even though I was feeling bad and that in itself is a small achievement.
It might seem like a drag that takes lots of effort, but it’ll be worth it. It’s only a small difference, but putting off the work that needs to be done will cause it to build up and it’ll become harder and harder to keep up with - and a lot of work to do all at once before a deadline or a due date can create a bad day in itself.
So, ask yourself - would you rather curl up under a duvet and put off your homework and studying, or just simply do it and then be able to do the aforementioned without worrying?