For home consumption, I keep a pad in kitchen and make notes just after dinner. I keep a doc called Notes on Google Drive (so I can access from home.office, or phone) to type up in batches (with my disclaimer on bottom). I try to write up within a day or two as my scribbles are atrocious.
At offlines, I try to make notes contemporaneously. Then enter following dates in my Notes doc.
Once my diary style notes are written, I post here and AFW (if from an offline with folks who post at Berserkers, I post there as well to troll for disagreement). This gives me search options (I can search for wine, or to discover what we served when Salil came to dinner, etc). My disclaimer helps limit noise in searches (I can search for Lapierre AND objectivity to find my notes).
I post to CT for wines that I have entered there, but not for most "everyday" wines or wines others bring to offlines.