Use single-point grounding for low-frequency applications (audio, analog instrumentation, 60 Hz power systems, etc.) with clock rates of 1.0 MHz and lower. Use multipoint grounding for high-frequency systems using clock rates greater than 1.0 MHz .
Minimize inductive trace lengths of components by not using sockets for through-hole devices.
Bypassing is a function of circuit resonance. Determine if the circuit is a series, parallel or parallel C-series RL network. Calculate resonant frequency.
Take into consideration the lead length of radial and axial capacitors when selecting a capacitor for a particular self-resonant range of frequency.
Capacitors decouple RF currents up to their point of self-resonance. Above self-resonance, the capacitor goes inductive and will cease to remove RF currents created by components. Certain logic families have a higher spectral distribution of RF energy than self-resonant frequency of commonly used decoupling capacitors.
Use parallel capacitors to bypass a larger bandwidth of RF spectral energy on all high-speed components and in high-RF-bandwidth areas.
Schematic design of PCB projects 
