Stick on adhesive labels also increase the disc thickness and I have found that many auto CD players will not play them and or they seem to get stuck in the player, especially in hot summer days when they have the potential to lift. Sharpie Ultra Fine markers work nice, not professional, but they work and they do not smear.
If you have to print, I would invest as runonce noted in getting a printer that prints directly to CD as noted using an Epson 730 or even the new Epson Artisan 1430 does a good job at a decent cost for a printer. The inks cost more than the printers these days
You also need to purchase CD's that are branded blank for printing,
Anyone still using Light Scribe?