Judging by your avatar, probably need to check out the thread on cleaning the screen, though I don't think they covered sputtum. Ditto the keyboard and general case. Might want to cover the whole with a sheet of plastic.
Actually, there's not much to do physically. Keep it clean. I use the 3M cleaning cloths with the microweave whatever. You can get them nearly anywhere in 3 packs. They last forever and you can wash them. As long as they haven't picked up something gritty, they won't scratch you screen or case. And they do a fabulous job of cleaning.
There are also the fans and cooling channels. Unfortunately, you can't really get to the fans on the new machines without getting really serious about disassembly, bad design IYAM, but you can clean out the channels on the heat sink and blow/suck on the rest. There are threads on all that. Do a search.
You can condition the battery, check your manual. There's some controversy as to the efficacy of this or if its even doing anything, but my personal experience is that a regular full discharge/charge helps keep my batteries up. Just run the machine down after turning off all programs and disabling the sleep/hibernate functions. Again, this has been discussed in here loads.
Otherwise, its all software. Check for driver updates and upgrades. The forums here are a good place for keeping up on what's available. Some folks recommend a full OS reinstall on a regular basis, say every 6 months or so. I only do it when things seem to be slowing down or stuff isn't working. As the old saying goes, don't break it if it ain't fixed. Beyond that, you can install Henrik's temperature monitor, and there are other programs that can help you monitor what's happening or let you play with the gear. Seems as though some folks have found some OC programs for the 5680 and are playing with that. Hopefully they won't have a China Syndrome.
You can also download the service manual for you machine from the CLEVO site. There are threads on that as well.
Finally, there is a heck of a lot of information in these forums, its probably the largest source for SAGERs there is as well as for other laptops and other stuff too. Pick a subject, do a search! A great pasttime for a rainy day.