Have the same thing PR. Have a baby journal (exact same one for both dc because I liked it & thought that was 'fair') and do try to keep track of things but know DS isn't getting as much attention as DD did at the same age.
For example, I used to take a hundred pictures of DD on her weekly birthday, & although quite a few were lost when the laptop decided to be shit went wrong, we still have a lot. I feel a bit :( that I don't have any nice pictures of just DS & I since he was born - I had 3 or 4 sets taken with DD by the same age. Will just have to make sure DH takes a few nxt wk when we're away.
I also try to remember that, whilst cameras are great, you can't be making the memory and behind the camera at the same time. Fewer pictures just means we've been busy living....
I am now keeping a journal too, so I can keep track of what's happening in our lives. I may try to get an album whilst on holiday to put snaps & other bits & pieces in as soon as we get back.