Being able to capture content away from the controlled environment of your studio means that, as a podcaster, the world is your oyster. Last September I spent 3 days in a tent with my family, but I had my recorder with me and was able to capture a snippet of what it's like to camp in Scotland. Now, when I get two minutes (ok, maybe 2 hours) I'll get it edited up and released as a podcast.
But the point is, I was in the field (literally) and I had the means to capture audio.
I started off using a Sony Minidisc Recorder with a little mic plugged in. While that usually did the job, I did experience reliability issues and then you've got the hassle of real-time capture onto your computer for editing.

Now I'm using an Edirol R-09 and it's probably one of my most favourite pieces of podcasting kit.

Time to share some tips, people -
What do you use for in the field recording?
What are your top 3 tips to getting the recording sounding right? (You usually have just one chance to get the take you want)
What are you top 3 tips for equipment that should be in the kit bag when you set out to record in the field?
And, if you wish, what are you best/worst/most embarrassing/most revelatory experiences while recording in the field?