Hi Honeycomb,
Congratulations on your new home! I don't know why I didn't see your post a long time ago. Are you still looking for ideas? Here's a couple of search engines that should be helpful. The first one also has a plant encyclopedia.
http://www.hort.uconn.edu/plants/
http://bestplants.chicago-botanic.org/query_simple.htm
As for your wooded area, consider natives. They will be more carefree and won't take over the world. I just love Celedine poppy - wood poppy with Virginia Bluebells. For your other shady areas as well as the woods, consider lungwort, hostas, ferns, tiarella - foam flower, heuchera - so many with wonderfully colored leaves, bergenia and lobelia cardinalis - cardinal flower. For a damp shady spot consider ligularia. There are a few different ones, one that has a spiked flower, another with a flower that looks like a black eyed susan and one with sploched leaves. It will wilt in the heat of the day, but a damp and shady spot will keep this clumper happy. It's a large plant.
These search engines let you search by bloom time, color, etc.
http://www.main.nc.us/naturenotebook/plantindex.html
http://www.ct-botanical-society.org/...leryindex.html
http://www.perennials.com/
As for plants that are easy, if a description says it forms a clump then you can pretty well figure it isn't going to run all over the garden. On the other hand, if it says 'vigorous' you can figure it will be in your neighbor's yard soon. Stay away from chameleon plant - Houttuynia cordata and 'ditch' lilies. Those are the orange ones you see growing by the roadside. Ajuga can get out of hand easily as well. Japanese honeysuckle, aka Hall's honeysuckle is another invasive pest as well as trumpet vine - campsis radicans. Yarrow can seed around and be a pest and so can Rudbeckia fulgida 'Goldstrum', a variety of black eyed susan.
For your sunny areas think about those daylilies that Edart mentioned. There are several varieties that rebloom, some that are everblooming and even fragrant. For part sun or sun think about hardy geraniums. One that is fantastic is Geranium 'Rozanne'. It starts blooming in May or June in my zone 7 garden and blooms it's head off until hard frost. One plant will spread to a 3' clump and take your breath away. Fillipendula is lovely in a sunny border as are many of the salivas and penstemon. Another fun plant is balloon flower - Platycodon grandiflorus. Kids love the balloon looking buds and it behaves in the garden.
Newt
When weeding, the best way to make sure you are removing a weed and not a valuable plant is to pull on it. If it comes out of the ground easily, it is a valuable plant.