There are considerable cognitive deficits associated with psychotic disorders and these deficits impact functioning and include areas such as executive functioning, processing speed, and verbal and spatial memory. Cognitive Remediation Therapy (CRT) has good empirical support and is designed to improve cognitive functioning through repeated practice of cognitive tasks and/or strategy training. CRT interventions are typically time-limited; can be conducted individually or in groups. Some involve extensive use of computers while others focus primarily on paper-and-pencil tasks. The goal of CRT is to improve cognitive function. Research has shown small to medium effects of CRT on neuropsychological measures of cognition, but whether these improvements are sustained or whether they translate into improved functioning remains unclear. Ask your care team if any CRT programs are available near you. There are many trials on CRT published.
A recent review can be found here: https://www.ncbi.nlm.nih.gov/pubmed/28511562