+0
Hi,

I would say "Go sailing".

But is it wrong if someone says "I usually go on sailing"???

Thanks.
+0
That would not be correct in most contexts.

Go on doing something = continue to do something.

Usually when a storm is coming, most people headed in to port. But not me -- I usually go on sailing.
+0
SopranoBut is it wrong if someone says "I usually go on sailing"???
Yes. It's wrong except as GG explained. All the -ing activities come directly after go without a preposition in between.

go sailing, go walking, go jogging, go running, go swimming, go skating, go skiing, go skydiving, go dancing, ...

CJ
Teachers: We supply a list of EFL job vacancies
Comments  
That´s GREAT !!!! Thank you!
 CalifJim's reply was promoted to an answer.
Students: Are you brave enough to let our tutors analyse your pronunciation?