I am now donating about $0.01 to the Mises Institute each time I do a search online. As my various writing committments require me to look things up at a rate of at least 20 a day, this means that I am raising a dollar a week (excluding weekends). Goodsearch, a Yahoo-based search engine, donates the money on the basis of the number of searches carried out. Details can be found here.
Most Samizadatistas will disagree with the Mises Insitute for being isolationist on foreign affairs, although this position is motivated more by a refusal to support collectivism (even the ‘good collectivism’ of a war of liberation) rather than the desire to see the USA lose, which is closer to the left’s position.
On the other hand, the Mises Institute is consistently against bad economics, government regulation, taxes and socialist theory as much as practice.
If the Mises Institute is too radically libertarian for your tastes, you can select another charity, you can even switch from time to time. Come to think of it, I could switch beneficiaries as I search different topics, or on different days of the week.