I want to lessen my forgetfullness and improve my memory.. what can i do? thanks in advance...

Sleep well: Methotrexate would suggest you have some kind of auto-immune disorder. Depending on which illness you have, there are a host of reasons why you feel forgetful. Visiting with a specialist in neuropsychiaty in conjunction with your rheumatologist may be an option worth exploring. I follow many patients with auto-immune illnesses and your concerns are not unusual. For now, do ensure good sleep!