Enough comes after adjectives and adverbs:
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It wasn't good enough. (Good is an adjective)
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I didn't do well enough. (Well in an adverb)
Enough comes before nouns:
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I didn't have enough money. (Money is a noun)
We use enough of before the and this, that, these & those:
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Are there enough of the copies I made for everybody?
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I've had enough of this rubbish.
We also use enough of before object personal pronouns:
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Were enough of them there last night?
NB Sometimes people put enough after a noun, but this is for effect as it sounds a bit archaic and formal.
Enough can be used before an infinitive:
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They don't have enough to eat.
