Even the steadiest of hands will succumb to camera shake when shooting handheld, particularly when you factor in the slower shutter speeds that are sometimes necessary when shooting indoors. The simplest and most effective way to eliminate blur is by shooting with a tripod.
Tripods come in different sizes and budgets, with all of them being a better choice than not shooting with one at all when it comes to reducing blur. These simple to use accessories are also handy for carefully making adjustments to your compositions and ensuring all the angles are straight in your images.
As well as a tripod, remote controls or timers are a handy addition to your kit, helping to cut the effects of shaky hands.