[shalmanese]

I think the most important thing to be aware of is that your own personal estimation in how willing some group of people is to help is regularly off by several orders of magnitude.

I've had people assume that person X must be asked several times a day for help when they're really asked once every few years. Alternatively, I know people who assume they are sending some totally unique request to someone who gets a dozen of the same inquiry every single day.

Until you get a good baseline figure of how competitive your request for help is, everything else is pre-mature optimization. The best thing is to just be lightweight about it and dash something off as soon as you think of it and to not be too emotionally invested in whether you get a response or not. Only when you gather evidence that the response rate is below what you expected should you try to optimize how you ask.