Get yourself a 2x4. drill 16 holes into it, paired together, label the 2x4 front and back. remove the lifters and drop them into the holes....or..bags labeled #1cylinder intake...#4 cylinder exhuast...ect ect..masking tape with labels on the lifter itself?? so many ways..
Im assuming your rebuilding the motor, if you dont know, when u remove the lifter, it will have an oil passage(a small hole on one side) that faces the lifter valley(inward). The block has an oil passage running through there and the lifter must be installed the same way, or you will burn it up due to lack of lubrication. Compende?