I'll answer in English; I'll hope you'll understand. I have the same problem, and what I do is to group intransitive/transitive pairs according to their pattern (-iro -> -osu, -eru -> -asu, -eru -> -yasu. -u -> -asu, etc.), and then I learn them together, as a pair. There's maybe a dozen patterns, but you still have to learn them. It's like learning strong verbs in English, you need to learn all three forms. There's no simple rule. Some webpages have lists of some verbs and the patterns, e.g.: http://thejapanesepage.com/w/index.php?title=Intransitive/Transitive_verb http://en.wikibooks.org/wiki/Japanese/Grammar/Transitivity but I make up my own lists as I learn new verbs. If you have an electronic dictionary that allows to look up words by initial kanji, finding pairs is easy. One shortcut is that verbs ending in -su are always transitive, but that still doesn't tell you which pattern to use to find the intransitive partner.

目的語が必要かどうかで判断します。 目的語が必要：他動詞 ex:建物を建てる 目的語が不要：自動詞 ex:建物が建つ