I personally use a android app for that - "Lucidity". It is great, gives statistics too. You can also tell it to give you reminders to do reality checks throught out the day, that might help you out with that problem too. I bet there are many like it (Free or not) with these features. You have to find out which way is best to record your dreams with for you. If you are really tired, just jot a few words down; places, events and peoples. Also, if there were any extra-ordinary things. If you need any help, just PM me. See you around
/Zelzahim