R.J.
I would always use murphey's oil soap a couple times a year on my leather furniture (product of being a barn kid is cleaning leather!) Kept them looking GREAT/ the leather soft and supple UNLESS it was painted instead of dyed. ((I made the mistake of treating a cheap leather piece like an expensive one, once. Bad decision.))
For small tears, I fixed them the same way we fixed saddles. A small piece of good quality leather underneath, an awl, and sewing the two pieces together with the third piece behind (sew piece 1 to the 3rd back piece, sew piece 2 the the 3rd back piece, so the 2 torn pieces are sewn edge to edge against themselves & OR Superglue (superglue was originally invented to hold skin together on the battlefield, it works great for tiny tears in leather as well). Depending on the size of the tear. An awl and sewing for larger tears (the first half is easy, the 2nd half means lining it up perfectly/ gets akward near the end).
I could be wrong, but I THINK the do-it-yourself-kits are essentially leather fibers and superglue mixed together... which should work great on small tears.