Having your clutch at the biting point always means you're wearing it down a bit. But it's just something that's unavoidable if you want to drive properly. If you just need to creep along at a few mph on flat ground, then go ahead and hold it on the biting point.
This may or may not work on your car as some cars will stall, but even some old 1L petrol engines are okay with it; If you raise the clutch all the way up without gas very slowly, you might be able to get it all the way up and save on clutch wear. You should probably take about 8-10 seconds to bring it up though so all depends on if you have to stop again beforehand. Obviously though you'll pick up speed the higher you bring the clutch up, so might not be useful if traffic is crawling really slowly.
Adding gas when you're on the biting point will wear it more, but again it's often a necessity and everyone has to do it. You should add gas before raising to the biting point to move off more quickly, the more gas applied the quicker you'll move off, and you can bring the clutch up quicker with higher revs if you want to move off even quicker.