Guides

Europa Universalis 3
Starting off, you may want to play as a larger country like Spain or France because as you will find, the game will guide you to success as these countries. An important thing to do while playing is to set yourself goals and objectives to acheive, such as retaking the empire as the Byzantines, even if they're unrealistic. If you're new, you may want to turn off inflation to prevent your economy from imploding on itself.

Victoria 2
Starting off, you will see two clear distinctions between countries, civilised and uncivilised. It's recommended you start as a civilised country as you will find with uncivs, they have a huge retinue of bonuses to everything they do (Military units have more morale, taxes make more money, industry makes much more goods, etc.) When picking a country, you may want to pick a secondary power to begin with, such as Belgium. This means you are relevant and powerful, but you won't get picked on so much. When you begin, you will find your self exploding with information overload. If you look at the top left, you will find a graph with your money and income just below it. Click on it and you will find your taxes. Disregard everything you know about economics and set poor taxes to 100%, middle class taxes to 25-50%, and rich taxes to 0% (we want the rich people to grow). After that's done, try and set military spending to 50% and Education as well as Government to 100%. Now ta da, you should be making a profit.

Hearts of Iron: Darkest Hour
It's recommended that you automate trade and industry. Industry works with a point system and various tiles have factories on them which each give points. Consumer goods are needed to reduce dissent. Production is the amount of points being used to produce things in your production queue. Supplies is how many points are being dedicated to making Supplies (a resource). Reinforcement and Upgrades are how many points are being spent reinforcing and upgrading your units. It's recommended you start as an easy country like Australia or Canada. Not likely to be invaded.