My standard 'kit' now is a knock off iPad charger for power supply ($10), USB mini A/B cable, an HDMI cable, a 16G SD card, and a Logitech K400 wireless keyboard with built in touchpad. I've been using double sided tape and the free Priority Mail 'small box' cardboard box as a case. So the reasoning.
The iPad charger from Apple is 10W (5v @ 2A) so even the knock offs try to meet that spec. If you are careful (and this is important because there are some crappy ones out there) you can get them for $10 - 15 and they are quite small.
I usually get a 9' (3M) USB cable, that lets me put the Rpi on a table close to a monitor even when the outlet isn't too close.
The HDMI cable is a much better way to connect your Rpi to a monitor than composite video :-) I haven't got audio over HDMI working, but a small portable speaker plugged into the headphone jack works great.
The K400 from Logitech gives me both a keyboard and a mouse. I don't use wired keyboards with the Rpi since it is way too easy to drop the keyboard and have its cord yank the works off the table and on to the ground.
I've got one on my desk which ssh -X's into a "real" computer and then throws a java script heavy dashboard up on the Rpi's X11 screen. Sort of like an X-terminal of yore. Running the browser native on the Rpi bogs down.
I've also got one serving up a static view of some database with json and thttpd. I've found that NFS mounting storage is more effective than using the SD card (in another thread where we were debating the longevity of SD Cards I took one and wrote a bunch of files to it until it failed, which it did fairly quickly, so I try to keep all file systems mostly readonly on the SDcard and R/W mounted ones. You could also use a USB drive for that. The Rpi's Achilles heel is that everything goes through USB though.
The iPad charger from Apple is 10W (5v @ 2A) so even the knock offs try to meet that spec. If you are careful (and this is important because there are some crappy ones out there) you can get them for $10 - 15 and they are quite small.
I usually get a 9' (3M) USB cable, that lets me put the Rpi on a table close to a monitor even when the outlet isn't too close.
The HDMI cable is a much better way to connect your Rpi to a monitor than composite video :-) I haven't got audio over HDMI working, but a small portable speaker plugged into the headphone jack works great.
The K400 from Logitech gives me both a keyboard and a mouse. I don't use wired keyboards with the Rpi since it is way too easy to drop the keyboard and have its cord yank the works off the table and on to the ground.