I have been playing this game for years now, and there is little tricks I wish people had told me. Here are a few of them.
1. If you click on everything you want to collect on then quit the game and come back everything will be collected without waiting for collection animation. This one I wish I knew about a YEAR ago. It makes things MUCH faster.
2. If you leave an enemy alone you can collect everything without the worry that all your advance clicks won't cancel out. This and the exit trick are a great combo.
3. When you get an offer to install a game...DO IT. You get 30 gems just for playing the game for 10 seconds. Plus if you play there other games you will often get 30 gems in their other games as well because they often do the same game promos in different games.
This one was really hidden for me. It's crazy but they don't promote that you get 30 gems per game installed. You don't find out until afterwords.
Plus you can get 30 more gems if you keep playing the game.
4. The ability to get Expansion Permits goes away if there is no land to use them. Always keep one plot of land open so you can keep making Expansion Permits. They make new land available quite regularly so it's good to have a backup of them.
5. Buy at least ONE RED FLOWER. I know it seems like a rip off for over 30 gems for a flower but there are so many quests that need red pedals. You can get red pedals from weeds but it's not common. Same yourself the trouble and buy one or two of those flowers.
Any other tricks I missed?