The best Amazon Black Friday deals are usually on electronics like TVs and laptops, however the best ones sell out extremely quickly. It's almost unfair how insanely quickly the best deals sell out, but then again, there's a reason Black Friday has that reputation. Make sure you are online before midnight, then be vigilant about pressing "refresh" on their Black Friday deals and sales page until the deal you want is available. Luckily, you'll know what most of the deals are before they go live, but some are hidden until the last moment, which can trick some shoppers with trigger fingers to accidentally buy items they don't want (yes, the deals really sell out that quickly).
Amazon rarely offers site-wide coupon codes, but they do offer coupons for specific products. During Black Friday and Cyber Monday sales, Amazon will automatically apply discounts when you add products to your cart. While there might not be lots of Amazon promo codes, they do offer peace of mind when shopping. For example, if you buy an item from Amazon, then spot an identical product on an Amazon competitor's site at a lower price, they'll refund you the price difference. As long as you see the identical cheaper product within 14 days, you should be covered. Review the Amazon price matching policy to learn more.
