When I hear Germans speak - but sometimes in writing too - I observe that the trailing "-e" from verbs in 1st singular person is often omitted:
"Ich geh mal schnell zur Tanke."
"Ich krieg noch einen Kaffee, bitte."
"Das hab ich doch schon immer gesagt."
"Ich freu mich schon auf Morgen".
Is these merely a dialect variation or are there general rules on when we can omit the "e" in spoken German? Is this colloquial only or are there occasions when we also do this in written standard German?