Is there a good replacement that will last longer than a few hours?
Is there a manufacturers spec on the bulb? They usually state a minimum lifespan but with most such devices it's heat that does the damage so ensuring the fan (assuming it has a cooling fan?) is working and no filter is blocked etc you could add a bigger fan??? Physical stress is also a 'killer' so no moving the lamp when hot or as it cools etc.
The usual precautions re handling (no fingerprints on the envelope etc) are observable etc.
The only other thing I know is that after-market devices, whilst supposedly saving you a few $, don't last as long as the OEM stuff - if you're using after-market that is?
You might have some success Youtubing for LED conversions if that model supports it.