I would suggest:
1.) Reading the owner's manual thoroughly, and several times. This applies to any new camera. There's a lot of good info in there that some of us overlook.
2.) Decide on which type of photos you like to to take most (action, portraits, still life) and concentrate on getting good at one category at a time, rather than trying to master them all at once.
3.) Try using a tripod. A tripod will slow you down a lot, but it will force you to really see your subject, and compose a better picture. Tripods aren't practical for every shot, but you may find that you like the results they give when you have the time to set one up.
I can only think of these three tips right now.
By the way, I don't own a K10D, but rather a K100D.
Good luck with your new camera.
Mike