Simplicity is the Ultimate Sophistication

The first answer might not be the whole answer. Keep digging, keep asking. Zoom in, zoom out. Take a break, focus again.

Go beyond just understanding in order to have a chance to come up with that simple, elegant solution.

One good way to start doing this is to try the 5 Whys approach:

5 Whys

If you have the chance, go back in time by reading the whole interview with Jobs and his team on the making of Macintosh Byte.