Of all the IQ tests and similar types of diagnostical tools I've used, what most often comes back for me as a bottleneck to other intellectual function, is my working memory. Due to this, my verbal IQ and performace IQ are quite far apart. Most psychologists I've spoken to have told me that the current data mostly holds that working memory is pretty static and there isn't much that suggests a possibility of improving it. 

Since this forum contains a lot of people that work in different sectors and expiriments a ton, I was wondering if any of you have suggestions as to what I could look at. Thanks