To remain an active blood donor, you must keep track of your last donation. You are eligible to donate every 6 to 8 weeks, so you must keep track of your donations in order to find out when can give again.

Keep your donor records filed on the back of your donor card. The first time you donate blood, you will be screened for certain conditions that may prevent you from donating your blood. Once you are approved, you will receive a card to keep in your wallet. This card contains information such as your name and blood type, which may come in handy. Your donor ID will also be on this card. On the back of your blood donor card is an area to record your donation dates and the number of pints you donated. It's helpful to record this information, in part so you know when you are eligible to donate again.

Write your donor records on a calendar. After you make your blood donation, you stay to rest and have some snacks and juice. A worker will give you a card, sticker or something else that states the date you will be available to donate again. Take this home and make a note on your calendar. If you do this routinely, you will always know when you last donated.

Go to your local chapter Red Cross website. If you want to know your own donor history, you might be able to find this information online by going to your local chapter's website (see Resources below). Using your donor ID you should be able to look up your personal history.