When you review a mix of card types — English vocab, subject terminology, general trivia — it's easy to lose track of which kind of card you're actually looking at and what mode of thinking it calls for. That's partly because every card looks exactly the same.
Try giving each note type a slightly different background. Leave English cards white, give subject-terminology cards a pale cream tint, and general-trivia cards a pale sky blue — even a difference that small is enough for your brain to switch gears the instant a card appears. Stick to light tones. A dark background hurts contrast with the text and can tire your eyes over a long session.
In ankieditor, click an empty area of the card to select the whole card, then pick a color from Background color under Text Style. Check the preview as you go to make sure the text still reads clearly against it.
Two things worth knowing. First, Anki templates apply at the note type level, not the deck level. If you already keep a separate note type per subject, this works exactly as expected — but if one note type is shared across several subjects, all of those cards will end up the same color. Second, once you set a background color it stays that color in Anki's dark mode too. If you mostly study in dark mode, either pick a dark-friendly tone or use a different way to distinguish note types instead — text color or a divider, for example.