Speedpicking Help

Ok I'm really starting to get serios about guitar. My major weak point is speedpicking and i really need some help on what to do to really improve this specificaly. What kind of routines do Youguys do (especialy you instructers) and how much time do spend on speedpicking alone. I've watched all the lessons on speedpicking but is there some certainway ishould go about practicing them? I know your supposed to start off really slow but how can you tell when you can really speed up? I'll accept any help Ican get.