Personally I think meditation/visualization can help. Studies do show that people with a more optimistic outlook or more relaxed state of mind have stronger immune systems.
Even without meditating, it's relatively simple to just tell or will yourself to get better, or imagine your body create more healthy blood every night before you go to sleep. It definitely couldn't hurt.
Son of 70 yo; diagnosed MDS 11/2008, treated with vidaza; diagnosed AA 3/2009, treated with ATG, cyclosporine and exjade; rediagnosed MDS 7/2009, restarted with 2 cycles of vidaza, but currently halted treatment of both vidaza and exjade due to severe effects from the drugs.