In some ways the best thing about buying a new lego set is getting the plans. Especially once you have a big box of parts, each new set probably isn't adding anything much to the parts collection you have, except maybe some of the special shaped parts or figures and some color consistency.
Still, given how much of the entertainment value comes from the information in the instructions I thought I'd see if I could find any online.
There's a lego modelling program called
ldraw but all the links below also have a pdf or otherwise printable version.
klingon ship
micro tractor
whoa. huge list of old set plans
minis at brickshelf
constructopedia
Dated: 03/01/2007