First of all this isn't a lesson on how to use photo editing software or anything similar, it's just giving information about what I use when editing photos, designing a poster or editing a video.
I shoot all my photographs in Raw. What is Raw I hear you say? Well, it's a file format that captures all the image data recorded by the sensor, not like Jpeg, which is compressed and you lose bits. Raw gives you the best quality and with the amazing software from Adobe you can take a photo you thought was rubbish and make it into something brilliant. Adobe has lots of different software for photo editing. I do a lot of mine in Lightroom.
Everyone knows about Photoshop it's the one that can take your spots and bumps away right? Well, it does loads more than that. I do all my poster design in photoshop. It gives you a plane canvas which you can just draw on.