One will also want to interact with Monika differently, either quickly deleting her or letting her monologue during Act 3. During one playthrough certain poems will need to be written: a poem for a different girl each day, and also sets of poems that Natsuki and Yuri are indifferent about. Players will need to go through DDLC at least twice: once for each of the two ending letters.
However, some tasks can be tricky and require a little planning. The quickest method is to simply beat the main game and Side Stories, which will easily raise data to around 60%. Hidden files do not count towards the percentage unless they yield other rewards. E-mails are granted as data like music and art are acquired.
