Spending on ads before your store is optimized (fix conversion first)
Not ordering product samples before selling (quality surprises kill businesses)
Promising fast shipping when supplier ships from China (honesty builds trust)
Ignoring customer service (chargebacks and bad reviews compound fast)
Testing too many products at once instead of giving each adequate ad budget
Not calculating true profit margins (skipping fees, returns, and refunds)
Copying competitors exactly instead of finding a unique angle
Scaling ad spend too fast (increase 20-30% at a time, not 200%)
Not building an email list from day one (cheapest repeat customer channel)
Treating dropshipping as a get-rich-quick scheme instead of a real business
Selling trademarked or copyrighted products (legal risk)
Not having a backup supplier for your winning product