Graphene plasmons, characterized by low losses and high spatial confinement, are emerging as a promising tool for fast electrical manipulation of light. This paper discusses the plasmonic behavior of graphene, including analytical methods to estimate plasmon energies and coupling strengths in graphene nanostructures. While graphene plasmons have been observed at mid-infrared and longer wavelengths, strategies to extend them to the visible and near-infrared regions are explored, such as reducing graphene structure size and increasing doping levels. The paper also examines plasmons in narrow ribbons and molecular-sized graphene structures, and proposes methods to enhance electrostatic doping without causing electrical breakdown. Results for plasmons in highly doped single-wall carbon nanotubes are presented, showing similar characteristics to narrow ribbons. The potential of perfect light absorption by a single-atom carbon layer and optically pumped transient plasmons in graphene is also discussed. Overall, the paper highlights the exciting possibilities for extending graphene plasmons to the visible and near-infrared spectral regions and ultrafast time domains, with significant implications for fundamental studies and technological applications.Graphene plasmons, characterized by low losses and high spatial confinement, are emerging as a promising tool for fast electrical manipulation of light. This paper discusses the plasmonic behavior of graphene, including analytical methods to estimate plasmon energies and coupling strengths in graphene nanostructures. While graphene plasmons have been observed at mid-infrared and longer wavelengths, strategies to extend them to the visible and near-infrared regions are explored, such as reducing graphene structure size and increasing doping levels. The paper also examines plasmons in narrow ribbons and molecular-sized graphene structures, and proposes methods to enhance electrostatic doping without causing electrical breakdown. Results for plasmons in highly doped single-wall carbon nanotubes are presented, showing similar characteristics to narrow ribbons. The potential of perfect light absorption by a single-atom carbon layer and optically pumped transient plasmons in graphene is also discussed. Overall, the paper highlights the exciting possibilities for extending graphene plasmons to the visible and near-infrared spectral regions and ultrafast time domains, with significant implications for fundamental studies and technological applications.