Hey man, I got my girlfriend a picture of me and her in a frame for her birthday and that was her favourite present. The notepad is a really good idea she'll probably love that too, honestly though man they like the smaller things rather than you spending a bucket load on them. Maybe take her out to her favourite restaurant is a good idea also, Just make her feel like you have gone to a lot of effort to make the day all about her! You know her better than your friends and anyone on her so I would just go with your instinct it is more than likely to be right! Good luck bud