Some ideas:

1) separate electricity generation from electricity distribution.  TANESCO to be responsible for electricity distribution only.  Large number of firms bidding competitively for electricity generation contracts.  Special incentives for companies generating green electricity (solar, wind, wave, sustainable biomass, sustainable hydro).  Many countries have competitive electricity generation markets.  Competition makes for more efficiency - the mobile phone sector in Tanzania is an example.

2) encourage community based local electricity projects whereby a community come together to invest in for example solar and the electricity is distributed within a local area

3) Some rules should specifiy that Ministers and senior officials in the electricity and energy sectors are not allowed to use fuel generators in their homes!  This will make them work better to ensure there is mains electricity!