I'm surprised no one has mentioned Hydergine yet - if they have but by a different name then Ooopsy on my:
http://en.wikipedia.org/wiki/Ergoloid
The combination of nootropics/smart drugs I read most about many years ago was "Hydergine + Piracetam"
http://forum.lef.org/default.aspx?f=37&m=16284
and...
http://www.consciousnesscafe.org/2005/01/nootropics-alert-on-hydergine.html
Don't forget that taking some nootropics along with prescription CNS stimulants (Adderall, Vyvanse, Ritalin + any and all combos or generics) can KILL You - such as:
Deprenyl + (Any Amphetamine) = Tachycardia
http://en.wikipedia.org/wiki/Selegiline (see Adverse Effects)
Interestingly enough "Keppra" (Levetiracetam) has been sold (as a prescription drug) alternative to Klonipin/Clonazepam as an anticonvulsant/anti-seizure medication.
http://en.wikipedia.org/wiki/Levetiracetam and
http://en.wikipedia.org/wiki/Clonazepam
My Mother was put on it as a preventative measure after brain surgery this past October where a 2cm X 3cm acoustic neuroma was removed from the region of her brain near her pons and (right) vestibulocochlear nerve.
She told me that the Keppra made her dizzy and made her feel as if she were going to fall when she was walking around.
She also indicated that Valium had never made her feel as disoriented as the Keppra.
So, she told her neurosurgeon that she was not going to take it and that was that. She's walking around just fine.
This is further evidence, IMHO, that there is an overzealous desire to eliminate any possible use of benzodiazepines from modern medicine in place of newer medications that have not demonstrated greater efficacy for similar purposes (especially in long-term studies) - but that do offer a major corporation opportunity for massive profit via a brand new patent.

In this case I think that is further shite because Keppra is simply a purified form of an already existing non-patented substance, much like Rozerem is highly purified Melatonin, but a bottle of one costs you $8, and a 30 tablets of the other $185.
Provigil is indeed an interesting medication.
http://www.medicinenet.com/modafinil/article.htm
I took it for one month to see if it was effective as an alternative to Adderall for my ADHD.
In that regard Provigil failed miserably. I took it for 5 days and wound up a complete mess, awake enough for sure - but hardly able at all to pay attention.
However, the 25 tablets I did have left over were very effective over the course of the next year whenever I had a long drive to make, a long night at the office and an equally long next day, etc.
BUT - I tell you this: Any amount of wakefulness you get from taking Modafinil will be taken from you once you stop taking it - at least that was my experience.
In one instance I took it for two days straight - and after the third day, when I went to bed I CRASHED for about 15 hours. I never sleep more than 6 - 7 hours on any regular night if that reference point is useful in considering what I wrote above.
Creatine monohydrate it AWSM. I've used it on and off since 1994 as a weight lifting supplement. Bang for your buck it is hard to beat with regard to giving you a noticeable increase in muscular size and performance in a short amount of time. At a base weight of 235 pounds I can get up to 245 pounds of bodyweight in 10 days or less just by ingesting one nasty, tropical punch flavored scoop of creatine per day as a post workout recovery tonic. If it increases brainpower too, well then fuck it - I'm in again.
CONCLUSION:
-----------------
I think nootropics are interesting, but I also think that there is significant danger in taking them - especially if you already have one or more psychoactive substances, be it an Rx medication, OTC, or of naturopathic formulation. Not enough studies have been done for us to fully understand the side effects of one or more with all the others - and the reason is simple - there is no profit in doing so.
I haven't fucked with them. Maybe when I'm old and grey and want to get better at crossword puzzles while I sit in my diaper at a nursing home I'll grab a few bottles of the latest and greatest nootropics and put to shame the best that the New York Times has to offer. Or maybe I'll be chillin' like a villain at a tropical bungalow doing the limbo with the natives while sipping Mojitos. Only time will tell, and as the blind man said
"We shall see."
Be safe and don't fuck with anything that can fuck you up.
-Halla74