The most useful way to improve at open-ended trivia is to build a consistent thinking process. These tips are general strategies, not a promise about Krillion's internal ranking.
Read the exact wording
A prompt's restrictions matter. Do not answer a broader or easier question than the one being asked.
Move past the first thought
List the obvious answers, then deliberately switch to another subject area. This reduces the chance that you submit only the most familiar examples.
Think in names and aliases
The official FAQ says answer sets can include aliases. When researching a subject, look for alternate names and common synonyms, but make sure the candidate still refers to the same thing.
Prefer a defensible answer
If you cannot explain why an answer fits, it may be a weak candidate. Relevance is more important than choosing a word solely because it sounds obscure.
Learn from feedback
If the game accepts an unexpected answer, consider whether an alias or alternate spelling explains it. If a reasonable answer is rejected, the creator's FAQ acknowledges that source coverage can sometimes miss an answer.
Keep expectations realistic
The creator says the Krillion pick considers fun factor as well as rarity. There is no public formula that guarantees the rarest or highest-scoring answer.