I have mentioned that you needed further processing to make the tack better, and so I will tell you. Have you ever broken a tack? It's brittle right? That's because it's been tempered (correct me if I'm wrong). All you have to do to temper it is to stick the thing into a fire. Wait a while until it gets red hot, or something like that. Then, dip it in water. That's it! It has now been tempered. It's now hard enough to go through wood, but then it's brittle. What you can do to make it durable again is to put it back into the fire. Wait until it gets just as hot. Then, take it out, and let it air cool. Do not cool it rapidly, as in put it in water or put it on front of a fan or similar. Do not do that. And use pliers when you hold that in the fire.
Another modification is to the comfort level of pressing it into a wall/cork board etc. With or without the above modification, take a piece of paper (better yet, rubber) and hot glue it onto the part you press on. If it's with the above modification, do it afterwards. It's as simple as that!
If you have any questions whatsoever, don't be afraid to ask!