Some other things that can be helpful are argenine, niacin, DHEA, panax ginseng, ginko biloba, or
horny goat weed.. HOWEVER, most of these things effect blood nitrogen,oxygen,or serotonin levels, so ALWAYS check with your doctor before starting any new supplement regimen!
Mostly, patience, a positive attitude, and a little playful experimentation will usually get the job done. Good luck!