One suggestion I have heard is to learn them in little groups.

For instance, learn the notes E F and G in all locations / octaves. Or A B and C. Etc.

Ultimately, it's best to be able to identify each note individually, cold. But sometimes using little groups of notes can help.

Reading / sight reading is a good way to get there. It drills it into your subconscious, so that every note is immediately known as itself, without having to play any games or calculate.

If you haven't done any reading yet, try something basic like the Mel Bay books. They work!

-Carl.