We propose two novel techniques for assuredly detecting Gravitational Waves through enhancement techniques proposed to make these ridiculously tiny waves detectable. Suppose that the Gravitational Waves are passing through the spacetime fabric, say, through a region bounded by two planes parallel to say X-Y plane, i.e. through a slab parallel to the X-Y plane. The first technique that we propose consists of continuously photographing the Standing Wave Pattern that we create in this slab which is bounded by two planes parallel to say X-Y plane, and through this slab these incredibly feeble waves are passing and causing stretching and squeezing in this region parallel to X-Y plane. We create Standing Wave Pattern in this slab parallel to the X-Y plane, which has extent simultaneously along X as well as Y axis, and we video shoot this region by fixing camera at a suitable height on say Z axis while Gravitational Waves are passing through it. Through this camera we video shoot the region of X-Y plane, to capture as large region as possible, where we have created the Standing Wave Pattern, which is present simultaneously along X as well as Y axis due to our special experimental arrangement. In the second technique we propose to create 2-dimensional Fraunhofer Diffraction Pattern due to a square shaped aperture, and also due to circular shaped aperture, kept parallel to X-Y plane in the slab through which Gravitational Waves will be passing causing stretching and squeezing of this region parallel to X-Y plane. Below this slab bounded by two planes parallel to X-Y plane we keep the screen on which 2-dimensional Fraunhofer Diffraction Pattern will be produced. As previous by fixing camera at a suitable height on Z axis we carry out photographing (video-shooting) of this 2-dimensional Fraunhofer Diffraction Pattern. Is there any simple way to enhance the extremely tiny local effects of stretching and squeezing of spacetime fabric when these waves pass through it? We suggest in this paper two novel techniques which propose to enhance the locally occurring effects on spacetime when Gravitational Waves pass through it through the technique of cumulative additions of such several tiny effects occurred locally into a big assuredly detectable and measurable effect!!