Positional puzzles are a bit harder to create.
There are many articles in chess.com that give positions and then analyze them, and some are positional, not having much to do with taking immediate material or checkmate.
A good chess book could probably help too.
This article http://www.chess.com/article/view/ideas-on-planning-from-the-greatest-chess-coach made me realize there's something I'd really like to have as a way to improve.
That would be a site with a punch of position puzzles where you have to analyze the position and make a plan for the next 2-3 moves. Then you could see all the weaknesses and considerations written out (not 15 notated lines to "prove" the best plan which at my level wouldn't help me nearly as much )and what the best plan would be.
It is easy to find tons of puzzles about checkmate in 2-3-4 moves, but positional planning seem to be a lot more rare.
It would be great to find a place that has a lot of those so I could go do 10 or so a day to work on improving. Anyone know of a good resource like this, if it even does exist?