Practice.

朝です。今仕事で歩いていますそして日本語を勉強する。
'It's morning. Now I'm walking and studying Japanese.'

Today, for the first time here, I bought an English newspaper for the English and not for the news.

..and conducting informal traffic volume and demographic studies on the Tokyo public transport system.

Yeah. I said it.

It's amazing what a difference 10 - 15 minutes makes.