I do several spreads every single night.

Tarot as a nightly habit isn't bad in itself. What makes it unhelpful is when the deck replaces action or rest, or when you keep pulling the same question to feel something different.

Four small signals worth watching — any one is reason to close the deck for the night:

• Same question, second time tonight. The situation hasn't changed, so the cards won't. You're asking the deck for permission, not information.
• Yesterday's reading didn't lead to a step you can name. A spread that ends in "I'll see how I feel" hasn't been used.
• The reading left you more anxious than before you sat down. That's the deck amplifying the worry instead of settling it.
• You can't summarize the last spread in one sentence. The card meanings were flowing past you, not landing.

And the obvious one: if pulling cards keeps you up past when you meant to sleep, or replaces a conversation you could have with someone in the room, that's the line.

There's no fixed cap from me — some readers sit with one card a day for years, others pull a three-card spread when a decision lands and put the deck away. The question isn't frequency; it's whether each pull still earns its weight.