I've been working through the Core 2K deck with 100 reviews a day and 5 new words a day. This takes me about 10-15 minutes a day. I also use Kanji Study to review kanji and help cement them, with reviews recently taking over 100 a day and 5 new kanji a day. This takes me about 15-20 minutes a day. As a bonus, this helps practice katakana. Then I practice immersion intermittently whenever I come across an untranslated hentai and read the Japanese raws instead. I also follow a lot of JP artists on Twitter, so I use their tweets as reading practice. I've been doing this everyday since the beginning of this year.