I was looking for something like this on the site (a single page that listed the aspects), something spoiler-y that wasn't an out-an-out-cheat, and I found some excellent guides and user documentation, but this is a super useful web-based tool (so it works on windows, mac, linux) that helps map routes to the aspects for unlocking research (and it also has info on what to combine to get what)
http://ythri.github.io/tcresearch/
http://ythri.github.io/tcresearch/
This script helps you with your Thaumcraft 4.x research. If you have a research note with two aspects that you don't know how to connect, simply choose them in the dropdown list above (From: and To:). Additionally, choose the minimum number of steps between those two aspects. If in your research note, the two aspects have two blank spaces between them, choose the value 2 for Min. Steps. Then click Find Connection and the script will search for the shortest path (well, with at least the minimum length) that connects the two aspects. Note that sometimes the length of any path is longer then the given minimum, but this should not be a problem for your research note.
source: https://github.com/ythri/tcresearch
source: https://github.com/ythri/tcresearch