One problem is that your curtains aren't full enough for the wide window. Houzz might have a formula but I found one here: http://www.ehow.com/way_6038775_many-should-hung-double-window_.html. Also, try this: remove the tie backs and let the curtains fall naturally. That should help a little with the fullness. Then buy pillows that bring in those colors. You can also add color to that bookcase by painting it the same color as the wall for a more built-in look. Add more collectibles or books to the shelves. Then find a large graphic poster for that long wall. Next pull the sofa and chairs closer to the fireplace so that they have at least two feet on the rug. Pull the end table closer to the furniture. Drop the picture on the right of the window down about 5". It's way too high.

I've been thinking of you,Fragle - I remember those sleepless nights when the babies first came home and everyone was sleep deprived but life-as -always still had to go on, esp for Mommy. So happy for you that you have a 'good' baby, I love the name too:-)

Flowers in those flower boxes would be a good start, and then I'd tear out the conctrete or whatever the surface is next to the house and extend the driveway further out, closer to the camera, to make up for lost driveway space. The down spout must be removed from he driveway. The steps up to the house seem to be a confused assembly of different materials and should be reformed into a cohesive entry stairway, with plantings flanking it, or pots of greenery/flowers on it. The garage seems to be a different color from the house and if that is the came, I would change it echo the colors of the house. In the foreground of the photo is an opportunity for some beautiful landscaping. You have your work cut out for you, but nothing that you couldn't do over the next 3 months!

About your plumber saying "plumb layout is confirmed". That is a load of rubbish. It's fairly easy to move drains around (yes he might have to rip up some walls, but he can also do off-the-wall installations to avoid that). In a small bath proper placement is of the utmost importance!!! If you have the bathtub and shower next to each other that will be much better and then the glass separator idea should work. padmaramachandran's (see post above) setup sounds more reasonable to me as well (see first picture below). This is similar to your setup but as you have more space you could put in bath tub and shower where the picture only shows a bath tub. Also if you do it that way you could theoretically have a bidet or a wider wash basin (small double perhaps too). Example layout: Do you need a bathtub in the guest bath? If not you have a lot more room to work with. E.g. for a double wash basin and large walking shower and a bidet (2nd picture). Example of off-the-wall installation for toilet and bidet and a large walking shower. Finally if you ignore this advice and do it the way you planned ;) then I suggest you really thing about that glass separator. Doing it right will make a lot of difference (see 3rd picture). Good luck!