How to prepare your store for CyberDay without falling apart

CyberDay (Chile's version of Cyber Monday, a massive 3-day online sale event) multiplies traffic by 5 to 10x. Stores that prepare sell a lot. Those that don't collapse under the load, fall behind on shipping, and end up with furious customers on social media.

I've been through several CyberDays from the side of the person building the store. The battle is won before the event, not during it.

Pre-event checklist (2 weeks before)

Stock and logistics

• Confirm actual stock for the products you plan to promote. Don't sell what you don't have.
• Prepare packaging in advance. Boxes, bags, tape, tissue paper. Buy extra.
• Talk to your shipping carrier and confirm capacity. During big sale events everyone gets overwhelmed. If you can, schedule pickups in advance.
• Set realistic delivery dates. If you normally ship in 3-5 days, communicate 5-8 during the sale event.

Store and technology

• Load-test your site with heavy traffic. If you're on Shopify, this shouldn't be a problem. If you self-host, verify.
• Make sure checkout works properly. Do a test purchase.
• Confirm that payment methods are active and have sufficient limits.
• Prepare your deals in draft mode so you can publish on launch day with one click.

Customer service

• Prepare quick responses for the most frequently asked questions: shipping times, return policy, stock availability.
• If you use WhatsApp Business, set up automatic replies.
• Define extended support hours for the duration of the event.

What deals work (and what doesn't)

Type of deal	Works?	Why
Real % discount	Yes	The classic. Easy to understand.
Free shipping	Yes	Removes the biggest friction point.
Gift with purchase	Yes	Moves inventory + delights.
Buy one get one	Depends	Only if your margins allow it.
Inflated "discount"	No	Customers compare prices. Consumer protection agencies watch.
Generic coupon for everyone	No	Creates no urgency.

An honest tip: you don't need the most aggressive discount. Many customers buy during sale events for the excitement, not because the discount is the best of the year. A real 15-20% off with free shipping can work better than a fake 50% off.

During the event

• Check your store every 2 hours: stock, payments, errors.
• Respond fast: a customer asking during a sale event decides in minutes, not days.
• Monitor social media: if there's a problem, they'll tell you there first.
• Don't change anything critical: don't update themes, don't install new apps, don't touch checkout. Every change is risk.

After the event (just as important)

• Ship everything within the communicated timeframe. Late delivery is the #1 complaint after any major sale.
• Send a follow-up email with the tracking number as soon as you ship.
• Thank new customers. A "thanks for your first purchase" email with a coupon for their next order works really well.
• Review the numbers: sales, real margin (after discounts and shipping), top-selling products, customer acquisition cost.

What I've learned from past sale events

The store that sells 500 orders and can't ship them on time loses more than it gains. Angry customers, negative reviews, chargebacks. It's better to sell 200 orders and deliver flawlessly than sell 500 and collapse.

Set a sales cap if needed. Close the deal when you hit your logistics limit. That's being professional, not losing sales.