I live near the airport and have multi-path from the planes. I tilted my Channel Master DB2 antenna way back. Not at a 45 degree angle, but tilted pretty good.
It seemed to help with most stations being a few degrees from each other and IIRC 30-1 in almost the opposite direction. Placement is important. It is currently in the third (and final spot) on the roof.
Oh and FWIW, I have a Samsung DLP and just replaced the lamp and housing from Schneider's yesterday. It was 4.5 years old with many, many hours on it. I decided against going into the service menu to re-set and check the hours, but I know it had a lot. It's like having a new TV again. But alas, Doug's calibration is gone. The difference in just looking at the the old bulb and new one before I installed it was striking. I took my old one with me and they pointed out a small bulge near the stem. It was also darkening. Thankfully, the price of the lamps has gone down considerably. I replaced it with a genuine Sammy lamp and could have saved some money online, but I could return it hassle free if it didn't work and walked out with what I knew would fit. I just hope everything else holds up.
EDIT: Don't forget to ground the antenna you install.