Constantly upgrade your base and have your workers doing something. Build and unlock everything possible and begin working on upgrades. Consider upgrading them all to the same level before progressing to a new level so that you have a balanced base. You can watch a video advertisement to eliminate ten minutes of waiting time. If there are less than five minutes remaining, you can rush production for free. Begin by upgrading your Storage building, then follow up with everything else. If you are short on money and you have free workers, raid until you have enough money to upgrade. You can also upgrade your heroes. Any of them can be upgraded if you have the cards. There is a possibility that more common heroes will be just as useful as rarer ones if they are of a high enough level. Consider upgrading as many heroes as possible at first. The cost to do so is very low for the first two levels. Decide which heros you like the most and focus on them. If you constantly get cards for a specific hero which you do not like, he or she might still get better than the ones you are using if they are at a higher level.