This is what I have done:
- Changed the font from serif to sans-serif.
This change has some impact. The top menu was too large now, so - I had to remove a menu item in the top menu.
Luckily did this change improve the readability. Due to this change I was able to - Display a darker background.
Both the old and the new backgroumd was based on a picture of grass. With the new background that is more clear.
In the bottom menu was the call for action: "Make a reservation now" - I have replaced the call for action in the bottom menu into: "Check availability".
This is a more inviting call for action. Of course the goal of the website is that people makes reservations, so - I made clear call to action buttons for "Make a reservation".
For the call to action buttons I used the same grass background as for the top and bottom menu. It looks really nice. - The text of the bottom menu is modified a little due to the fact there is another call to action now.
- At the page "reviews" and "back at home" I have a clear call to action to write a review.
- At the contact page there are even three call to action buttons now.
"Make a reservation", "Write a review" and "Mail". - Very important is of course the call to action button "Make a reservation" at the page "Availability".
- At the page "Availability" I have changed the text a little. I includes now the phrase "now" to create an urgency to make a reservation.
- The HTML code is upgraded form XHTML 1.0 to HTML 5 for all pages.
The most important feature of HTML 5 is that you are now able to use - A placeholder for all "text" fields.
- The appropiate fields are changed from "text" to "email", "url", "search".
- Some fields are marked as required now.
I believe that these small changes improve the usability of the website.