Seriously, we put solar city on our house (46 panels). Right now, we pay $100/month for electricity and are locked in on that rate. We even end up with extra that is sold to Xcel (we expect about $300 back at the end of the year from them). Xcel is already pushing to increase their rate for next year (to 14.5/KWH) and we will continue to pay only $8 / month to Xcel for their base. Even better yet is the fact that we grandfathered in with this so that as Xcel's prices increase, they will be forced to pay us the same price. Down the road, they will get that part removed for NEW installs.
We then changed out our bulbs from a mix of incandescents/CFLs to mostly LEDs with about 13 more bulbs to replace. We did that when Cree bulb prices dropped to below $10/$5 for Br30/A19. We will replace the other 13 when the prices drop again (6 of these are the global bulbs used in a bathroom; so the bulbs are right now $20 for good ones and I refuse to buy the cheap junk from GE, Lights of America, ecosmart, etc ). Once that is done, then only 3 bulbs will remain, which will simply continue to use the old bulbs on (crawl space; under-stairs;outside light that is almost never used).
We have figured out that based on the KWH, that we save about $5-10/month (we have kids that leave lights on). As such, these will be all paid for in 2 years. That is not a bad deal considering that we have removed nearly all of the mercury, and no longer have to wait for CFLs to come on (well 7 bulbs, but they will be replaced at the next sale of cree ).