A few of the most obvious power saving techniques:
In BIOS I routinely disable everything I don't need. Normally you don't have to since most components will power themselves down when not in use, but I don't want them to be accidentally awaken by some silly script or program. And in my experience, auto-suspend doesn't always work properly.
On the CF-30 I disable:
LAN (ethernet) since I use wwan or wlan most of the time and activate these only when I need them.
dvd media bay
Express card slot
PC card slot
Currently debating with myself over disabling touchscreen since I occasionally take a stab at the screen with my fingernail to click on buttons. But the damned thing can draw around 2W. What I'm really trying to do is to make it auto-suspend as quickly as possible but according to powertop it seems to linger on and won't power down once I start using it. This may be a bug and I need to figure that out or stop using it altogether.
LCD Brightness Mode seems like a goofy feature in BIOS. It basically cuts the maximum brightness level in half. I think I can control myself and adjust brightness manually and not keep it on full blast all the time. Sometimes in direct sunlight I need my 10000 nits. At night I can use it on one or two ticks above the lowest setting or completely low in total darkness. Power draw is around 3W including controller when at 100% brightness. At its lowest setting it's less than 700mW.
A bit less obvious: If you noticed the Tunables section of powertune, it does help a bit to set everything from BAD to GOOD in that list. I automate the process by using
and run it automatically when I log in. I'm almost sure that this works better than the pm-utils powersave mode.