Prime Day has grown from an Amazon birthday promotion into the second-biggest shopping event of the year. But the deals are genuinely uneven -- some categories are excellent, some are thin, and a significant number of "deals" are items that weren't actually discounted from their normal price. Here's how to shop it without getting played.

Prepare Two Weeks Out: Set Price Alerts First

The most important Prime Day prep step is verifying what the normal price is for anything you're planning to buy. Do this before Prime Day starts, not during. The reason: Amazon has a documented history of raising prices in the weeks before a sale event so the "X% off" badge looks bigger on the day of. If you haven't tracked the price, you can't tell if a deal is real.

Go to CamelCamelCamel.com, search the items on your list, and look at the 90-day and 180-day price history. If something is showing as 30% off on Prime Day but it was that same lower price three weeks ago, it's not actually a deal -- it's a normalized price with a sale badge on it.

Best Categories: Where Prime Day Consistently Delivers

Amazon Devices are the most reliable Prime Day buy. Echo, Kindle, Fire TV, Ring, Blink -- these hit their lowest prices of the year at Prime Day, sometimes by a significant margin. If you've been on the fence about any Amazon hardware, this is the time. The discounts are real and consistent year over year.

Headphones are excellent. Sony WH-1000XM series, Bose, Jabra, and budget brands like Soundcore regularly hit their Prime Day lows in the range of 30-50% off. This is one of the best non-Amazon categories at the event.

TVs have gotten better at Prime Day. Not Black Friday-level, but 20-35% off mid-range 4K TVs is achievable and genuine during Prime Week.

Kitchen gadgets and small appliances -- Instant Pot, coffee makers, air fryers, vacuum cleaners -- see good Prime Day deals. These are also a category where Amazon-private-label deals can be solid (Eufy vacuums, for example).

Worst Categories: Don't Bother

Fashion: Discounts are typically 10-20%, which is barely above normal promotional pricing. Not worth planning around.
Groceries and pantry items: Subscribe and Save deals exist year-round. Prime Day grocery discounts are usually shallow. Better to use everyday S&S coupons.
Books: Prime Day book deals tend to be on niche titles and e-book bundles. If you're looking for specific titles, the deals are hard to predict.

Lightning Deals vs All-Day Deals

Lightning deals are time-limited (4-12 hours typically) and quantity-limited. They create urgency, which is the point. Some lightning deals are genuinely good -- I've seen products at all-time low prices in a lightning window. But many are engineered primarily for FOMO and the underlying discount isn't as impressive as it looks.

The "all-day" deals that run through the full event are often more reliable indicators of a real price cut. An item that's been reduced and stays reduced throughout Prime Week vs a lightning deal that resets to full price after 6 hours -- the former is more likely to be a genuine discount.

Invite-Only Deals

Amazon has been expanding invite-only deals, where you request an invitation to buy at a particular price before the item goes live. Check these in the weeks before Prime Day and request invites on things you want. Acceptance isn't guaranteed, but you get notified if your invite is accepted and can purchase at the reserved price during a limited window. These are typically the steepest discounts in a category.

Stacking with Subscribe and Save

If you have 5+ active Subscribe and Save subscriptions, you qualify for 15% off on S&S eligible items. Stack that with Prime Day coupons on qualifying products and you can get meaningful combined discounts on consumables. This works particularly well for household staples -- paper products, cleaning supplies, supplements, pet food.

Non-Amazon Counter-Sales

Target Circle Week and Walmart Deals both run concurrently with Prime Day, because both retailers know that's when deal-seekers are in shopping mode. Don't forget to check both. Some items -- particularly in appliances, clothing, and home goods -- are cheaper at Target or Walmart during their counter-events than at Amazon during Prime Day. The best-deal answer isn't always Amazon just because it's Amazon's event.