You just bought a digital SLR camera and feel completely lost with all the options and settings (or just too lazy to read that thick manual)? You can head over to Camerasim.com and try out the online SLR camera simulator. Play around with the options and sliders for a while and you might just understand the relation between shutter speed, aperture, ISO and how it affects your photos.

And if you are really into travel photography, you should definitely check out the MatadorU Photography program and the live workshops to further improve your knowledge.