Different ways of communicating or allocating work, increased structure, memory aids, increased feedback and assigning a buddy or mentor are also adjustments you may find useful to consider. The best options will be identified through a process of discussion and negotiation with the employee.
Also, remember that many employees with mental health conditions will manage perfectly well in the workplace without the need for any adjustments or accommodations, but in the context of managing a return to work, it is important to consider them.