Christian Zibreg, writing for iDownloadBlog, lays out a metric ton of iPhone/iPad storage saving tips.

Like this one:

Restarting your iPhone or iPad once a day not only ensures smoother than usual performance, it also gives iOS a chance to clear caches that are clogging up the ‘Other’ storage section, visible upon connecting an iOS device to iTunes. Cached files are created when streaming or viewing content like music, videos and photos.

You cannot delete these system caches manually as iOS automatically removes them when it needs more space. Restarting a device may prompt iOS to clear at least some cached content. To restart your device, hold down the power button until a “Slide to power off” message appears, then slide to restart.

And:

Force-restarting your device forces iOS to wipe clean its temporary files and purge caches. To perform a force restart, press and hold the Sleep/Wake and Home buttons simultaneously until an Apple logo appears. In addition to clearing caches, this method may help your device run a little faster for some time.

Never thought about force-restarting. I generally only do that when I do an iOS update. Any down side to this approach?