Learn Finnish: Minä en kirjaa uusia tapoja johdonmukaisesti.

The strictest rule for objects in Finnish is that if the main verb is negative (en kirjaa), the object must be in the partitive case. Because the sentence refers to multiple habits, both the adjective and noun take the partitive plural form uusia tapoja.

What type of verb is kirjata and how do we get the negative stem kirjaa?

Kirjata (to log or to record) is a verb type 4. To form the negative present tense, you drop the -ta infinitive ending and double the final vowel to get the stem kirjaa. The negative auxiliary verb en then pairs with this basic stem.

Why does the p in tapoja remain strong, unlike in the plural nominative tavat?

Consonant gradation (from strong p to weak v) usually happens when a suffix closes the syllable. The plural partitive suffix -ja leaves the syllable open (ta-po-ja), so the strong grade p is kept. You also see the final -a of tapa change to an -o- before the plural -j-.

How can we break down the long adverb johdonmukaisesti?