1. Participate in Events
- Many events offer shields as rewards for completing milestones
- Actively participating in events is one of the fastest ways to stock up on shields

2. Complete Quick Wins Tasks
- Quick Wins tasks often include shields as rewards for completion
- These tasks are quick and easy to do, making them efficient for shield replenishment

3. Land on Shield Tiles
- Shields randomly appear on tiles around the game board
- Landing on these tiles will automatically add a shield to your inventory
- Keep an eye out for shield tiles as you move around the board

4. Spend Monopoly Cash
- You can spend Monopoly Cash in the shop to purchase shield packs
- While not free, this allows you to directly buy shields if you're in need

5. Repair Damaged Landmarks
- When a landmark is attacked, it consumes one of your equipped shields to protect it
- Repairing damaged landmarks will free up those consumed shields for reuse

6. Avoid Attacking Others
- Each successful attack you make on an opponent's landmark consumes one of your shields
- Minimizing attacks helps preserve your existing shield inventory

For an additional edge in the game, consider purchasing cheap Monopoly GO Dice from U4GM. More dice can help you land on those crucial shield tiles and progress faster in the game. Use the coupon code "harry" at checkout to get an extra 5% off your purchase!

By focusing on events, quick wins, shield tiles, and landmark repairs, you can efficiently replenish your shield supply without spending real money. Balancing your attacks is also key to maintaining a healthy shield count.