A makeup concealer has become my best friend. I didn't ever used to use a concealer - I would just put on some foundation and be done. But as I began to notice some lines and wrinkles around my eyes and mouth, I decided I needed to do something different.
This isn't really a specific wrinkle treatment if you have deep lines, but can really help when you first start to notice those annoying lines. Applying some concealer under your foundation will help them not be so noticeable.