[sangy]

i had the same issues especially with photos. As a phd student working in the lab and field, i took many photos over a week that spanned several categories (lab,field, testing, sample prep). many photos belonged to more than one category. at the end of the day (figuratively), i would just sort photos by date. now i am working on cloud platform with interfaces with a mobile app. i sort photos on the upstream end as i take them with my phone camera, by appropriately tagging and captioning them, and i manage on the web platform. photos can have multiple tags, can be sorted spatially on a map as well as by time. very very convenient and excelling documentation for my phd work