First you need to determine the part of speech of the word. Depends on the writing end of it. So, if you are dealing with a noun, you need to determine the declension and case. Then you have to remember which end is written in this grammatical form.
In nouns of the third declension spell the end of "and" in the genitive, dative and prepositional cases. For example, in the syntactic unit "on stuff" you need to write in the end of the letter "I", as it is a form of a noun of the third declension, prepositional. This is the end you write, if you use a noun of the first declension in the genitive case.
The ending "e" must be written in nouns of the first declension in the dative and prepositional cases in the second declension only in the prepositional case. For example, the word "a daughter" refers to the first declension and is used in the prepositional case. So it has the ending "e".
To write end in adjectives, pronouns, ordinal numbers and participles, you need to put to him the subsidiary question, and to determine the gender and case. For example, in the sacrament of the "smiling" you need to write the ending "im" as it is possible to raise the question "how?", it refers to the masculine and is used in instrumental case.
Checking the end of the verbs, determine their conjugation. In verbs belonging to the first conjugation, in the end ofx is written the letter "e" in the singular, ie they can be the end of "eat", "eat", "em", "ete". If the verb used is plural, then it will be the end "ut", "ut". For example, the verb "writes" the end "et", as it refers to the first conjugation.
In verbs of the second conjugation write in the end ofx the letter "I". For example, the word "clean" to write "and". If they are used in the plural, will have the ending "at", "Yat" as in "clean".