Verbs are used to describe actions, e.g.: yo canto or to establish relationships, e.g.: Jorge es mi amigo. To write verbs correctly, you need to be able to identify and produce the different forms a verb can take.
The base form of the verb is called the infinitive. This is the form listed in the dictionary and it is the starting point for using a verb in a sentence. Mastering Spanish verbs involves learning infinitives (since they supply the basic meaning) and knowing the different forms a verb takes depending on categories such as tense (e.g.: present, past, etc.), mood (e.g.: subjunctive, indicative, etc.) and subject (e.g.: yo, tú, etc.). Providing this information allows the infinitive to "come to life" in a sentence.
A list of anglicisms involving verbs can be found here.