well, i can relate man, being called lazy might sum it up but not fix a thing..
ive been coasting on 1 adderall 25mg a day for a couple of weeks and i feel great.. no real longings or downtime, just the occasional sweaty day in the 90 million degree texas weather. as for long term use, i'd probably go along with the other people here saying you should get it checked out if you're planning a 5-6 month spree because.. in my neck of woods, adderall isnt that easily found anymore and prolonged use for that long might cause damage when self-medicating
but if you're interested in random weeks of intense focus (you have to make yourself study still*) go for it.. i usually try to start doing something and right when i feel my interest slipping, i re-up and then on track for a good while
other than that... evlove really seems to have a good list there.
*i once took 60mg and got ready to write my highschool exit essay and instead reorganized my entire mp3 collection complete with comments, album art, release dates, tracks, and anything else available. to this day my mp3's are incredibly well managed and that paper happened to get turned in a few weeks later.