What do you think is the most efficient way to make your site compatable in different browsers and different resolutions.
Do many of you do a browser redirect using java to determine resolution?

I develop using standards that will work on all browsers and try to pick up layouts that will work at 800x600 and above. I also make sure to check everything on all common browsers and run my layout through validators before any sort of a release.

When I use additional user friendly stuff like JavaScript (menus, validation, etc) or advanced (not entirely compatable) CSS attributes, I try to ensure browsers unable to display them will be given an alternative. (<noscript> for example)

I do not use any sort of redirection based on user selection or browser/system detection.