Purchase or activate a game that supports Steam Trading Cards
Play the game to earn card drops
Check your Steam Inventory for dropped cards
Buy missing cards from the Steam Community Market
Trade with other Steam users for cards you need
Use Steam Points Shop items or boosters if available
Craft badges to receive booster packs
Open booster packs to get additional cards
Participate in eligible Steam events or promotions that award cards
Sell items on the Community Market and use the funds to buy cards