FIND THE PERFECT BASE:
Keep looking until you find a base with what you're looking for, say you want to upgrade your town hall, we all know that that's EXPENSIVE, so, how would you get the money in the first place? Raids, find a partially weak base with about 120,000+ gold, if that base has already been raided, go for the gold mines.
This is the fun part, first, place a giant or two near a tower guarding your loot, when the defenses are locked on the giant, place two wall breakers as close to the gold storage as possible, then send out the rest of your giants, then your horde of goblins, if your giants are low on health, use a healing potion, same thing with the goblins, too.
TRAIN TROOPS THEN REPEAT
After your epic 3 star raid, do whole thing again until you have the money.
(No execution notes)
Doing this gets you far, that's how I got the gold to upgrade my town hall to level 7.