I just like to keep it more simple than that.. but for #/8 and #/16 you can't get much more simple than earthman has said..

I just go "1 and 2 and 3 and 4 and..." for 4/4 time.. or "1 and 2 and 3 and" for 3/4 time.. which is what earthman said already.. but yeh.. I am hopeless at reading sheet music.. and my biggest battle with sheet music is the timing.. not so much about what time signatures are but where I am to start the next chord.. I just play it how I think it's meant to be played and listen to the other musicians and it's fairly obvious when I am wrong, so then I teach myself that tiny bit as a memory exercise etc