Before you start consider buying a good top coat to keep everything in place.
First, to open the nail glue stick a pin down the top to pierce the opening.
Apply the glue to the bottom of the nails and attach. Hold for 10 seconds.
When finished, file off any rough edges with the nail file.
If you would like them shorter, cut them with nail sizes and file any rough edges.
To paint the nails always go from bottom to top in one sweep, one stroke in the centre and one on each side to cover the whole nail. Wait until fully dry before applying another coat.
Once second coat is applied and STILL WET carefully drop the rhinestone or decoration where you want it on the nail. Make sure you put it pretty much where you want it because you can't move it around to much or you'll wreck your polish. You can use an orange wood stick to position it correctly.
When you decoration is in place on all your nails (and it will be held there by the wet nail polish), let them dry and then apply a clear top coat. This will hold everything in place and make your new gorgeous nails shine!!