One common problem that contributes to insufficient sleep is poor sleep hygiene. For many people, better sleep can simply be a matter of changing bad habits that interfere with relaxation as one prepares to sleep. It may take some discipline and faith, but when people follow these guidelines, they’re likely to experience improved sleep within a short period of time.
For reference, an average individual requires 6-7 hours in bed to obtain a restorative night’s sleep. Regardless of the particular reason, if a person’s sleep is restless then the number of hours spent in bed may have to be increased beyond the aforementioned average of 6-7 hours. So, the quality of sleep is just as important as the number of hours.