I GAVE UP! ;) I tried weekly and made it to 7 weeks. I've always done monthly before that. So as of this week, I decided to go back to monthly. It's how I save my pictures on the computer and even when I do find the time to start organizing and printing pics to crop, it's hard for me to convert the monthly saved pictures into weekly printed pictures. It was such a headache.
Not to discourage you but I was just laughing with a friend last night at what an epic failure I was at this thing, LOL!!!
I think a modified version of monthly is just fine and it's still a huge accomplishment! Good luck!