@Jasper: There's been like hundreds of posts over the past months where some reference was made to "Hey, Dogboy, go buy a book!"

Basic usage:
бы + past tense form

Я бы хотел...
I would like

Было бы здорово, если бы ты завтра пришел.
It would be really nice if you came tomorrow.

Я бы тебе помогал, если бы ты не так подлым был.
I would help you if you weren't so mean.