ally, dont't worry too much k? Babies are rather resilient creatures. If you're still concerned about his "small" intake, then perhaps you can increase the frequency by dream feeding either during the day or at night if he's sleeping through.
jan25, those milk trays are a very good idea, especially if you're on the "low" side or dont't have much storage space. It can be a morale boost when you look at it psychologically (breastfeeding is just half of that). Also, have you tried increasing your fluid intake? I find that in my case, two things affect my supply drastically - my period and fluid intake.