Since you're opening a baby-shop, I'll give you 3 advice:
1) Always remember your business (products/services) are related to babies/kids. Be ethical in what you're offering. Don't scam parents!
2) Sell at reasonable prices. Parents will love you for it and become repeat customers.
3) Give top notch customer service. Understand parents needs first, and their budget. Don't just push to close sales and sell snake oil. Sell meaningful solutions based on the products you carry.