How can I perform the most effective form of Guru service through writing, according to the text?

The text suggests that the best and most certain service through writing, one that grants the fruit of salvation, is to write the biography of your own Sadguru. As detailed in Chapter 0, this should be undertaken by the Guru's command or through inner inspiration. Following the writing, you should personally study it regularly, perform hundreds of readings (Parayans) and weekly recitations (Saptahs) with a firm resolve, pure heart, selfless love, and unwavering devotion. It is also beneficial to encourage other devotees to do the same. This type of service is considered a supreme form of bodily and verbal devotion.