What is the best way to remove pet hair from my couch?
user
The most reliable way to remove pet hair from your couch would be to actually vacuum the couch frequently.  
If the pet hairs aren’t too heavy, you should be able to vacuum them right off of the couch surface.  This is actually the best way to help keep your couch clean.  Vacuuming frequently will help keep the couch from looking messy, and it will also help keep pet hair off of the couch surface so you don’t have to worry about removing the pet hair manually.

If pet hair on your couch is really heavy or persistent, you might want to try vacuuming more often, or you might want to try a power vacuum.  You can also try to spot-clean the couch by vacuuming just the spot you want to clean.  A power vacuum is probably a good option if the pet hair on your couch is really persistent.  You can try a handheld vacuum, or you can try a power vacuum.  You might want to try a vacuum with a hand-held wand attachment, or you might want to buy a full-size vacuum that you can use on the floor.

If your couch has a high-pile fabric, the pet hair can tend to become really embedded in the
assistant
What is the best way to remove pet hair from my couch?
user
Try vacuuming frequently.
assistant
What is the best way to remove pet hair from my couch?