You can always search and find various songwriting tips online. Through Google alone, you can already discover millions of related resources in just a matter of few seconds.
However, let me tell you that a majority of these tips are superficial. And sometimes, that causes them to be ineffective. After all, songwriting is an art that heavily relies on personal motivation and desires. Although it is true that there are technical aspects that you should follow in songwriting, the art still boils down to how creative you can get.
The tips that I have listed here are something that you wouldn't find elsewhere. They are unique because I am far familiar by the idea that songwriters and other artists operate differently. I am not assuming that I know you guys thoroughly. Instead, I am just stating that what I have here can help you eventually.