For spelling completion, always try inserting vowels first, as many English words miss a vowel.
Alphabetical order follows dictionary comparison: compare letters one by one.
In punctuation, focus on capitalization, quotation marks, apostrophes, and proper ending marks.
Word formation tasks usually test vocabulary—use only given letters.
Related words need a logical or semantic connection to the given word.
In word-chains, keep track of the last letter carefully to continue the sequence.