i know my question has no real answer but since i have a major issue with remembering some russian words, i'm asking you all how you do not to mix up everything and simply memorize vocabulary.
for instance, i keep mistaking podpissat', raspissat'sia, vypissat' all the time.
and the same obviously goes with many other verbs with prefixes. if those prefixes (or whatever you call them) sometimes add a valid point (otstupit', vyidti', razdvinut'), sometimes, they're just losing me.
the podpissat'/vypissat' example is a perfect one.