We all have too many photos on our phones. Try and dedicate an hour a week (or even a month) to organising your photos; filing, and deleting doubles or photos that you just won't ever use. When it is time to create your photobooks and you don't need to spend hours organising that massive backlog, you'll thank yourself!
And don't forget to back up! I highly recommend that you have a look at Miss Freddy over on instagram for some great tips and online courses aimed at keeping your digital memories organised and backed up.