Verbal Aspect (how the action takes place)
Note: the perfective aspect does not have a present tense (the present, by definition, cannot be completed).
Mnemonic: the Imperfective is Infinite (long period of time)
The Subjunctive Mood
Note: the perfective aspect is used for positive statements whereas the imperfective aspect is used for negative statements.
N.B. "бы" is sometimes shortened as "б"
The Present Tense
Spelling rule: after г, к, х, ж and ч, -ю becomes -у and -я becomes -а.
Note: a lot of Russian verbs are irregular.
The Past Tense (for both aspects)
The Imperative Mood
Note: For the first person singular, use "давай" + infinitive (imperfective)/or the 1st person singular of the future tense (perfective).
Note2: For the first person plural, use "давайте" + infinitive (imperfective)/or the 1st person plural of the future tense (perfective).
The Future Tense
Note: the future tense in the imperfective aspect is also known as the compound future
Reflexive Verbs (-ся- verbs)
Russian Verbs Cheat Sheet by LaghmanC
The basics of Russian conjugation including verbal aspect, moods and tenses