Looking at the career and achievements of Gary Nicholson, it’s a wonder the man has ever gotten a full night’s sleep. The word “prolific” seems paltry when considering his talents and scope. Nicholson’s songwriting and co-writing credits alone include more than 600 compositions recorded by greats across a wealth of genres, and a short list of recent cuts includes: “He Won’t Ever Be Gone,” a heartbreaking tribute to Merle Haggard that closes Willie Nelson’s new LP God’s Problem Child; the title track of the new Taj Mahal/Keb’ Mo’ collaborative album Don’t Leave Me Here; and the title cut on Give More Love by Ringo Starr, with whom Nicholson has been collaborating periodically since 2003.