From: Ann

General spot remover
good for blood, chocolate, coffee, mildew and mud.
Dissolve 1/4 c borax in 2 c cold water. Sponge on, 
let dry and wash as recommended.

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Ink
wet with water, apply a paste of cream of tartar 
and lemon juice. Let sit 1 hour, then wash. or try 
hairspray right before washing

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Washable Markers
Rinse stain in cold water till it runs clear, then 
wet the stain with rubbing alcohol. Blot with 
another cloth until color is removed then launder 
using hottest water allowed for fabric

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Poster paints and watercolors
try above method. If stain remains, soak in 1 qt. 
warm water, 1 tsp dishwashing liquid and 1 T 
vinegar. Wash in hottest water allowed