Go to free-blank-sheet-music.com and select from their menu either standard, piano, guitar, or bass sheet music. Print the kind you want.
Begin drawing the note by making a slightly slanted oval. If you're looking at the page, the oval should be pointing to the upper right-hand corner of the paper. Make sure the top of the oval touches the line directly above it, and the line directly below it. If it's on the line, it needs to go halfway up into the space above it, and halfway down into the space below it.
Draw a blank oval for a whole note, a blank oval with a stem for a half note, a filled in oval with a stem for a quarter note, and a filled in oval with a stem and a flag for an eighth note. For multiple eighth notes that are next to each other, draw the filled in ovals with their stems, and connect them with a bar that rests on top of their stems. For sixteenth notes, draw this same thing, but draw another bar just slightly underneath the first bar.
Make sure, when drawing your stems, that any notes below the B line two steps above the G line in the are pointing upward, while any notes above the B line, have their stems pointing downard. The stem should start being drawn on the high point of the oval, and the length should be about three spaces. For instance, if you begin drawing your line from the B line (which would be for the A note), the end of the stem should be touching the imaginary A line above the top line in the clef.