Transhumanists have high hopes for enhancing human cognitive abilities in the future. But what realistic steps can we take to enhance them now? On the one hand Flynn effect suggests IQ (which is a major factor in human cognition) can be increased a lot with current technology, on the other hand review of existing drugs seems rather pessimistic - they seem to have minor positive effect on low performers, and very little effect on high performers, what means they're mostly of therapeutic not enhancing use.
So, fellow rationalists, how can we enhance our cognition now? Solid research especially welcome, but consistent anecdotal evidence is also welcome.
Exercise has demonstrated good effect on memory and a bunch of other mental stats; the cause apepars to be the release of neural growth factors (and likely better circulation and general health).
Do you have a citation with more details on this, or at least recall what kind of exercise? i.e., low-intensity endurance, high-intensity strength building, cardiovascular improvement, &c.?