I have a 6.5x9' bathroom remodel and the way I have laid it out feels spacious for our small home. It has a custom made 18x36" vanity with a large sink and a few mini drawers and shelves. Beautiful and the crown jewel of the room. I have a tall 15X15 tower in a corner, another free standing cabinet along one wall, and a counter height cabinet at one end of the tub that is on the 6.5' wall. All custom cabinets with pull outs.

I agree with @roarah, that you wont be able to have both a tub and separate shower. The placement of the window and the door is critical to your layout.

Why don't you draw up your floor to a scale, on graph paper and post an image of it for us to look at. Here are some examples of my layout attempts. I made scale floor plan with door and window. Then i cut out tracing paper scaled to size room elements and moved them around on the base plan. Very helpful for me. I took photos of each one. I have more but didn't want to bore you :)

Window is on the lower left of the plan and the door is on the right:

Toilet is seen easily when the door is cracked, so this layout was eliminated. notice in the upper right there is a small square, that is where my tower is, so I drew it on the master plan, because that was staying no matter what plan I chose:

Nearly there, but want more storage space:

The plan I went with, though my vanity ended up with my soapstone sink that I made:

Finished bathroom. There is a free standing shallow cabinet behind the door, (position shown in the 3rd layout above):

That is such a perfect bathroom Enduring!

Wow, what a beautiful bathroom in such a compact space. You are to be commended.

Thanks to you both. Do you have any ideas for @andrea for her bathroom planning? When I did my bathroom on the forum in 2011, I really had to work at it. Posting here was so helpful. So many things to consider.

For example if the window is over the tub, I believe code dictates that it be of tempered glass.

Here is a helpful site for bathroom layouts and fixtures:
http://starcraftcustombuilders.com/bath.htm#.V9rSGbWimTU

Look around on the site because they have a lot of info on bathrooms

thank you everyone! we decided on a tub shower combo as we can't squeeze in both. @enduring that is great bathroom and gave you gave me a great idea! i will work on this tomorrow wand upload a picture!

window is 26 3/4 (thats including molding), its on the 9 foot wall, about 31 inches fromt the wall. door is on the 7'8 wall, off centered.

Here is a double vanity with a shower tub combo. I put a bench at the end, I envisioned it with a storage pull out drawer and pretty cushion top but the space might also work with built in tall shelves too for storage.

Here the vanity which can be 6 instead of 5 ft is under the window I like this for floor space is larger but you can only place a mirror over one sink essentially.

Another space saver can be installing a pocket door, instead of the swinging door. Save space. I you use a well made, heavy duty tract system it will last for years. I don't mean the ones that cost less than $100