Always start by looking for the subject! 1. Do you have a subject? (it must be in the nominative case! it can be noun or pronoun)
Then look for the verb! 2. Do you have a verb? An auxiliary? A modal verb? (it must be on the second or last place) 2a. Do you need a separable prefix? It must be at the very end!
3. Do you need a noun? It must be following an article or possessive pronoun (or a preposition)
4. Do you need an adjective?
It should be following an article or a possessive pronoun and must be followed by a noun!
5. Do you need a preposition?
Is there - with no other explanation - a noun in the dative or accusative case?
6. the sentence is grammatically correct without the blank > adverb