People will tell you to stick with it, to believe in yourself, to have confidence that it will happen and to not give up.
They say these things because they are the best advice they can give without just telling you about different techniques and stuff.

That's all you can do. There is nothing else you can try. All you have left is to stick with it. People do get them after trying for a long time, so you should do just that, since there is no magic word or technique out there that has the secret key to simple lucids.