We generally tell folks to leave the incision/cut alone until there is no more open skin. (after the steri-strips fall off, for sure!) Unless you've got complicating factors, your body is the best expert and has the best method of healing the juicy new injuries. Leave it to it's own devices.

After you have a nice fresh real scar (no ooozy bits or thin rip-able pink bits) use whatever you like best, but we warn folks NOT to use a product containing petroleum jelly or mineral oil or other petroleum derivative, as they can clog up the new skin and also be very drying. (my rule of thumb is "if you wouldn't eat it, don't put it on the new scar")

When the scar has matured a bit you can safely use petroleum stuff, silicone, scar release/massage, etc.