Quick Wins (High Impact, Low Effort): These are the most attractive projects, giving you a good return for relatively little effort. Focus on these as much as you can;
Major Projects (High Impact, High Effort): While these give good returns, they take a long time to complete – meaning that one “Major Project” can crowd out many “Quick Wins”. If you’re engaging in these, make sure that you complete them quickly and efficiently and that you disengage your effort as soon as you can;
Fill Ins (Low Impact, Low Effort): Don’t worry too much about doing these – if you’ve got spare time, do them, but drop them if something better comes along; and
Hard Slogs (Low Impact, High Effort): Avoid these. Not only do they give low returns, they crowd out time which would be better used elsewhere.