Ordinarily, I would consider the use of an HA filler for the treatment of smile lines. This would usually be a robust HA volumizing filler when cheek volume deficit is at the root of the smile line development or direct injection of a low viscosity, cohesive, malleable HA filler directly along the fold when there is little cheek volume deficit to account for the smile lines. However, through the years, I have used subcision, without any additional filler at all, to elevate and smooth smile lines. I would be reluctant to suggest treatments, such as peels or microneedling, which are best reserved for superficial, surface textural irregularities. And I would suggest a healthy dose of buyer beware when being hawked, as you no doubt will be, expensive, supposedly "next big thing" light and energy-based gizmos, such as fraxel lasers or RF devices, as the hard science to support their use lags well behind the heavy marketing hype and social media buzz to hawk them. You would be wise to consult with a board certified cosmetic dermatologist with extensive experience in performing subcisions. Hope this helps and best of luck.