lupineshadow: Ranged shooter guards are horrible
Other guards you can hopefully defeat in some way without incurring significant losses
Capturing enemy towns on Day 7 is also a big help
Attack ranged shooter guards with flyers.
Sometimes guards would rather jump aboard your bandwagon than go down fighting. So leave room in your attacking army. You can always pass them on to a second hero, or even disband them if they are creatures you really don't want (e.g. zombies).
Capturing enemy towns on Day 1 of the next week is even better, when playing against the computer, because you always go first, therefore can immediately claim the week's new recruits before the computer player has a chance to.