One VERY handy thing to know: when resizing elements, ever had it so that your strokes don’t resize properly with the rest of the image?
If you go to Illustrator > Preferences > General
Then ensure that ‘Scale Strokes & Effects’ is checked so that when you resize, it will resize your strokes as well, solving that annoying problem of images being messed up! You’d think as we’re dealing with resizable vector images that this would be automatically on, or when items were grouped it would happen automatically, but hey ho, very simple when you know how. Have a play around with the preferences, it can really make your workflow much better.
Will publish some more tips here when I find ones that don’t seem too obvious and are useful…