In what way was Tilak the forerunner of Gandhi?

Although Mahatma Gandhi regarded Gokhale as his political Guru, his ideals were moulded by Tilak's thoughts in a big way. Gandhi laid great stress on prohibition, Swadeshi and boycott. All these had been preached and practised by Tilak much before Gandhi did so. Gandhi's ideal of Complete Independence was similar to Tilak's idea of Swaraj.