There is only one method of finding a good injector - by the word of mouth. Ask your friends, ask those who had previous injections with the results you like. Avoid internet-based info or reviews and ignore self-promotions. Look at the "before & after" images. Above all, read as much about facial aesthetics, Botox and fillers so you can ask questions. Only then you have a good chance to find someone who not only knows how to inject but why to inject. You will also have much better chance if you seek an injector among the Plastic Surgeons rather than any other specialty. But always keep in mind that the majority of monstrosities so obvious in many "celebrities" were not created by a random, unexperienced injector. Good luck!