One of my favorite little Twitter bots is @year_progress, which tweets every 3.65 days when 1% of the year goes by:
I have my own analog version on the edges of my page-a-day logbook. One of the first things I do at the beginning of the year is make a little index system for the months. I like having another visual of how the year is progressing. (Here’s the notebook I use, and a similar index system.)
See also: How much of the year is left?