Archers Matter
When you first start playing, it can be tempting to spend your gold as fast as you can earn it, investing in workers and other such things. If you do that, though, you won't be ready for the impending enemy invasion. Make sure that you prioritize for walls and archers. A single archer won't do you much good, since shots often miss, so try to gather many archers and let their combined might turn adversaries into pincushions. Don't necessarily build towers for your archers, though, because then they won't want to go anywhere else.
Early Bird Strategies
Your expansion needs to come in small spurts. Start as a day begins, and assign your tough jobs at that time. Otherwise, if you start a task late in the day, your people might keep working on it well into the dangerous night. And when you build a wall, you'll also need to spend time strengthening it once it has been constructed, which is difficult if you put that construction off until later in the day.
Explore Constantly
When you explore, you can find great treasure. You should look for treasure chests to the east and west of your base of operations, and a single chest can go a long way toward funding your growth so that you can become more powerful and fend off nasty foes.
Population Growth
If you want a larger population in your kingdom, you'll need to find lost souls int he forest and give them coins. Also, make sure that you don't destroy camps. It's easy to accidentally do that by cutting down trees that are located along the edges of a camp, so make sure you leave those standing or you'll lose camps and the potential population growth they would have enabled.
Archers Matter...