Filling in the blanks

Went to Meadows Farms yesterday to try to fill in the blanks in my garden plan. It's very hard not to pick up extra things just because they look good, but I limited myself to lilies of the valley and lady's mantle, both of which will work in shade gardens. Bought two Plum Pudding heucheras and am now wondering where I thought they would go. I have two in the front garden and one in the white garden, so I added one in front and have put the second aside for now. Oh, and I also picked up three creeping phlox and planted them by the mailbox. At least I bought some things I had planned for.