Lie on your back, spread your legs, put your forefinger into your vagina and move it around till it is really wet.
Now pull your finger out and let it slide in again, but this time through the backdoor. Place the thumb of the same hand in your cunt. Massage yourself a bit and get to the edge while your free hand strokes your clit.
If you have not collected the items mentioned in the beginning, go and collect them now. Move on once you have all of the items.