Cheap:
Slip-on rubber Pachmyr recoil pad (come in S, M, & L)
Ugly as sin & "grabby" WRT catching your clothing.
I also think that they can effect practical accuracy, since they can slip & slide around.
Not as Cheap:
Leather lace-on pads.
They don't seem to be as sloppy a fit, but still not as solid as a permaent recoil pad.
Gettin' to be Real Money:
PAST recoil pads work pretty well, are not as thick, and seem to effect consistency less than the slip-on & lace-on pads. I bought mine used (& promptly washed it.
What rounds are you shooting? Turk milsurp will get your attention, as will the 196gr S&B. Romanian is not as spunky. Remington 170gr is mild in recoil, velocity, and energy.