Soak dirty stuff in Napisan - especially if it has had milk on it, milk can often go mouldy in just a couple of days on a vest or bib, I have found, especially if you put it in a bag to await washing. Rinse other food based stains in COLD water before washing, as soon as poss after the stain has occurred. If a stain doesn't come out in the wash, hang it up in the sunlight if you can to help get the stain out - once you tumble dry a stained item, the heat will help to set the stain in place forever.
I have always chucked away any clothes that are absolutely lagged in poo, just not worth your time trying to clean them off IMHO, not so much in the first few months when on milk only diet but once weaning begins this will make sense 
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What someone suggested above, the peg-hanger-thingies, are a lifesaver! I use 4 of them just for family washing as it is now and intend to get a couple more before my next baby arrives.
I tend to dry our clothes outside (i realise this isnt an option for you) or on airers then finish them off in the dryer, or just dry straight from the washing machine, but according to my DH this costs a disgusting amount of money, so be prepared for the cost of drying if you get a dryer, and research to find the most energy efficient one you can!
I don't know how some families can manage without a dryer, but somehow, they just do!