Originally posted by hmirchev do you have any advice and tips on how to get started with the camera, any hidden settings, etc? Also I saw some threads about a split screen modification, so should I get it since I'll be using only manual lenses?
Congratulations on your first DSLR, and you already have an excellent lens bag to go along with it (or are those new acquisitions too?) -- they all look like keepers. The stock focusing screen, assuming that's what you have in the camera, is designed for slower lenses -- the depth of field it shows is somewhere around f/3.5. This makes focusing an f/1.4 (or even an f/2) lens rather hit-or-miss, although with practice you can still do pretty well. I use the S-type screens from focusingscreen.com and really like them. Some prefer the KatzEye.
tromboads has already given you the most useful K10D trick I know.
It's worth reading the entire user manual, or at least going through all the menus to see what's there. There are a lot of settings you might want to change. One setting you will need to change is the "using aperture ring" setting to allow you to use your old lenses.
Some raw-only shooters like to set the contrast to the lowest setting. This has no effect on the raw file, but gives you a histogram that is a closer match to the raw file.