Here is some usefull tips I am using in the game. Also surf youtube for some good farming tips.
Keep your trophies around 900 to 1150 while you are upgrading your village. See below link on most efficient way to drop trophies for farming.
Protect your mortars. They do the best splash/overall damage.
Upgarde your weapons and walls
when you have spare cash.
Upgrade to level 5 archers first.