I'm currently trying to identify which factors contribute to my rhinitis and a series of other conditions. I'm looking for a program or website that allows me to log and easily watch later which foods I ate at which time, to write down the current weather, in which place I was, etc. I don't need something particularly complex.

The tool would allow me to see my past results in some graphical way, ideally (otherwise just creating an excel file would me sufficient).

I know there are sites geared toward food logging, but I'd like something a bit more general, if possible.