I recorded application due dates, application submission dates, requests for letters of recommendation, requests for phone/skype interviews, invitations for on-campus interviews, interview dates, and rejections.
In addition to formal communication, I maintained a simple professional website with an IP tracker. The site came up on the first page of results for a search on my name and I included the web address in my application materials. I checked the hits at least a few times a week and in the case where the IP address mapped to a university, I recorded the first and second visit dates. If I applied to multiple positions at a university, I assigned the hit to the earliest application date unless there was a good indication of department in the IP (e.g. genetics.yale.edu).
For large geographical areas with only one university, I counted hits from the city where the university was located even if it wasn’t through a university assigned IP address (e.g. for University of Utah, also hits from Salt Lake City). I did not do this for cities with multiple universities. Thus, IP tracking data is much more robust for large state universities than it is for universities in areas like Boston, New York and San Francisco.
It is likewise more accurate for universities with one open position than with multiple open positions. Finally, it is much more accurate for applications with earlier due dates (say August through November) because later on there started to be too many hits to parse with as much granularity. The data set suffered a bit because the task grew in complexity as other demands on my time increased and my anxiety over finding a position diminished.One of the things that all job applicants express is the frustrating with the Great Job Application Cone of Silence that happens. It seems to me that this is one of those small ways to break that Cone - if your website is getting hits from places that you're applying, you're at least making one cut.
Readers, what has your experience been with professional websites (like about.me, etc.)