Im a fan of small acts of defiance against a world that often shits me as a way to keep the beast within sated, Ive worked in some pretty horrible places doing pointless work to pay to live in this society that I often hate, so I run private guerrilla campaigns against my employers, simple stuff like dropping cig butts into the urinals at work on a regular basis. After 6 months of that management was going totally batshit trying to stop the phantoms who were smoking in the dunnies. Other things I have done are graffiti with stuff like 'please leave a mark here if your job is being made more difficult and unpleasant by incompetent management' then leave a pen nearby, 3 days later 17 x's marked down next to it. Print out long, poorly spelled manifestos on stuff that is ticking you off, not the big stuff but the little stuff, like ringtones or the lack of decent lettuce these days and leave them on park benches, public transport, at work etc. Its probably pointless and petty, but it keeps the juices flowing and the mind occupied.
A more extreme thing I have been known to engage in is finding a busy corner in a city, dropping down a box, standing on it and having a good rant about the things that are irritating you and why. Dont swear or be nasty but let the beast off the chain for a bit and just rant. You will never see any of the people who hear you again, sometimes you draw a crowd, often you can rant for 30 mins and people will just keep walking. I find the whole thing strangely therapeutic .
That and gardening, growing your own food is good for the soul.