I often carry a notebook along with me outside, but always transfer the data to the computer, usually on a spreadsheet. Through the years, you will find that searching your notes will be so much quicker, especially if you standardize your input parameters. Even the way I name my photos is also standardized. I use the same spreadsheet formats year after year. One for seed propagation, one for other propagations and one for hybridizing, along with running sheets (present & past) that catalogs everything in the ground that I grow. Put these all in separate folders by year, and those in an All Year folder, and you can search through many years of information all at once!
When the debate is lost, slander becomes the tool of the losers. - Socrates