Preserving lamp life

[Disky76]

Okay, so I am new to front projection, and since the price of projection lamps are ridiculous, I was wondering how to save my lamp?

I run my projector in low mode, and don't see any reason to put it in high mode, so I know that adds like 1,000 hours, but how else can I save it?

I read that turning it off and on a lot can wear down the bulb, but how many times is excessive? Should I just turn the bulb on daily when I watch my movie (s) and leave it on until I am done even if it's hours later? Is turn the projector on one or two times a day within reason?

Or will turning it off and then back on again, say two hours later, be a better way to save the bulb? (As opposed to keeping the projector running for hours watching several movies back to back?)