I was sharpening one of my knives tonight and got to thinking, I wonder how many people just don't know how to sharpen knives or are just discouraged because those cheap knive sharpeners never work right, and sharpening stones are intimidating to buy because of all the grits and sizes and can be expensive.
It's really easier then you think and you already have all the tools you need, I like to set the edge on a piece of a broken cinder block, but you could use a rock, a piece of sandpaper or a file or anything with a coarse grit or hard pourous surface.
Setting an edge is usually not necessary unless the knife was abused or is new and cheap
I like to hone my edge(smoothen and sharpen with precision) against the bottom of a coffee cup, I even prefer it over any fancy stone I've ever used, the ring around the edge of the bottom is usually unpolished and unpainted, the ceramic is the perfect grit to hone the edge nice and smooth with minimal burr.
Then there is Stropping(getting rid of any burr and polishing the edge) for this I use a pinch of baking soda and a bit of saliva and make a paste and coat the inside of my leather belt(you could use cardboard or a piece of wood if you want)
When edging and honing I always use oil(any oil, tonight I used beard oil), but it's not needed, all it really does is helps keep tiny particles of metal shavings away from the blade and shapening surface. giving you a smoother edge and less burr. Sharpening is all about getting rid of the burr.
As for the angle to work at you have to feel it out, use the coffee cup for that not the edging surface, a thicker blade will need a steeper pitch, probably 22.5 degrees, a thinner blade you can drop that anywhere down to maybe 15 degrees, your knife will tell you, I think of it like slicing cheese. Generally the comfotable working angle of the knife to shave things is the angle you want to sharpen it at.
Going to bed now but I'll answer any questions people might have in the morning if you leave them in the comments, Sharpening your knives is easy, fun, and will make them safer and more efficient and doesn't have to cost you a penny.