What are some of your stain solutions?

Hot wax:

Place Absorbant Paper Towel (or butchers paper) on the stain and iron on low heat till wax melts into the paper. Repeat if necessary till wax is gone

Permanent Marker/Texta:

Carpet - Hairspray (spray on leave to dry and brush gently)
Walls - Antibacterial Hand Sanitiser Gel, wipe on and off with a soft cloth
Tables & most other hard surfaces - Whiteboard marker, write on wipe off...

Stains around taps (non varnished/gold/bronzed taps):

Soak some vinegar in some cotton wool or soft cloth and squish in around taps leave for a few hours and eventually it will loosen the calcium build up and you'll be able to wipe it off.

Red wine on the carpet:

Pour some white wine over the top and it will become clear, then soak it up with a terry nappy then clean as normal.

Oil stains on clothing:

WD40 (or kitchen oil spray) spray carefully and closely to the stain so not to get *more* oil on the shirt than necessary. Then rub a dishwashing liquid concentrate into the stain and wash as normal.

I'll add more as I think of them...