Here is what I have, tips for you that I formulated:
1. Always purchase a castle archer early on - If the enemy tries to raid you at the beginning
with 2-4 swordwrath or something, you will find a single castle archer can hold off small groups of foe.
2. Don't forget to send your miners to mine. They don't automatically mine when you start, don't end up getting destroyed because you forgot that simple step.
3. Purchase the miner wall early on. Helps a good bit at blocking damage, especially if you have castle archers/archidon that can stand behind the wall and headshot the enemies as they attempt to break the wall.
~Posting more as I think of things~
Feel free to post your own tips & tricks!