What's the best way to say, "run an errand?"

errand → komisyon, ale vini, monte desann

run an errand
fè yon komisyon
regle yon bagay
regle yon zafè
fè yon monte desann

1.  I am going to run an errand.
     Mwen pral regle yon zafè.
     Mwen pral regle yon bagay.

2.  She went out to run an errand for me.  She'll be back soon.
     Li sòti ale fè yon komisyon pou mwen.  L'ap tounen talè.

3.  I went to run an errand for my Mom.
     Mwen te ale fè yon komisyon pou manman m.

4. I'm going to run some errands downtown.
    Mwen prale fè yon ti monte desann lavil.

5.  I went out to take care of a few things.
     Mwen t'ale fè yon ti ale vini.