Firstly, play through all the songs you wish to burn. Make sure they are ok & not corrupt
before you burn them to disk.
Secondly, whilst 24x is ok, if possible, burn at a slower speed if the disk type you are using allows it. I think 24x is maximum iTunes allows, try a lower speed if possible. CD-R's will normally give options of burning to 4 or 8 or 12 or 16, etc. speeds. Choosing the minimum speed is always best for audio or video disks. (You can choose faster for data disks.) * Make sure you choose Audio CD format & not mp3 disk.
Thirdly, choose reasonable brand CD-R's. Not made in China or Taiwan. Cheapest disks will give poor results, probably last less than 12 months before playback problems or distortion starts, and also be less reliable to burn to.
Image sample below is Mac OSX iTunes so might look a little different.
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