Photo 1:
The area where the sticker is to be placed must be clean, dust and grease free. Use a little methylated spirit to remove grease (wash muddy cars carefully first to avoid scratches). Place the sticker upside-down and carefully remove the backing paper.

Photo 3:

Whilst holding the bottom with one hand, carefully rub the sticker into place with the other.

Photo 4:
You can do this for instance by just using your thumb, from top to bottom.

Photo 5:
Once the sticker is firmly in place remove the foil over the sticker, at an angle of 90 degrees.

Photo 6:
And there you are!

Photo 2:
Turn the sticker over and place it where you want to stick it. Hold the sticker such that only the top edge is in contact with the object.