Although I go generally still travel with my Kingston multi-country adaptor (this one), I find that a rarely use it. It ends up being too big for some sockets, a bad fit in others, and is just generally "big". I now normally only carry it as a backup, and in case I end up routing via somewhere that I wasn't planning to.

For day-to-day I travel with 2 of the much smaller plug-specific adapters for the country(s) I'm travelling to, and a power board. You can pick these adapters up on Amazon or a site like Deal Xtreme for a few dollars each, and although there's the occasional bad quality ones out there, the vast majority are good. Many of these even support multiple things plugged into them, like this one.

For a power board I used the Monster OTG400. These used to go for about $10, but looks like they are closer to $20 now. At the end of the day most any powerboard will work fine, but keep in mind that if it's not completely passive (eg, it's got a circuit breaker, or USB ports) then unless it's specifically made to support 100-240 volts then you might have problems in other countries!)