Hi, I've been interested in EA for years, but I'm not a heavyhitter. I'm expecting to give only dozens of thousands of dollars during my life.
That said, I have a problem and I'd like some advice on how to solve it: I don't know whether to focus on short-term organizations like Animal Charity Evaluators and Givewell or long-term organizations like Machine Intelligence Research Institute, Center for Reducing Suffering (CRS), Center on Long-term Risk (CLR), Long-term Future Fund, Clean Air Task Force and so on. It feels like long-term organizations are a huge gamble, and if they don't achieve their goals, I will feel like I've wasted my money. On the other hand, short-term organizations don't really focus on the big picture and it's uncertain whether their actions will reliably reduce the amount of suffering in the universe when taking into account the long-term future like how CRS or CLR claim to do. What do you think?
That's a perfectly fine attitude to have! In that case I would likely advice donating to short-term charities rather than long-term ones which are more speculative. I don't have as much experience with the former myself, and so have to defer to e.g. GiveWell's recommended charities and the like.
Also, if you discover in a few years that you're more or less risk-averse than you'd thought, you can still reconsider where to donate.
Finally, if you care about getting as much "bang for your buck" for your EA donations, keep a look out for ~yearly recurring donation matching events like this current one by Double Up Drive (though in that case it's not entirely clear to me whether they match donations outside the US, and to which extent these donation matches can be considered counterfactual).