I'm not to knowledgable about extending WordPress — my extending is limited to whatever plugins are at hand to download (that I can find) and what basic default features are available in WordPress. However, my current predicament is that I would like to provide a list in my side bar that displays the titles of posts (and links to said posts) from the last day there was a post (from a certain date or category) and sorts them in order of categories.
The website I'm currently constructing is for a student magazine and I'm organising "issues" of the magazine by setting the dates of all the articles from that issue to the date of that issue's release.
I'm wanting the list to essentially be a global element on the website; to list the posts in a specific category order for the latest issue, which would be the last date that there would have been any postings registered in a certain category or to whatever the date is specified for the list to display.
If anyone has any idea of how I could achieve it, either by default WordPress means or a plugin, I'd really appreciate any help!