Plans Plans Plans

sometimes I think if you spend too much time researching too much information, you go into paralysis mode.  I've researched and researched but haven't made a decision on excursions or a hotel in London. It the quest to make everything "perfect" I can't seem to make a decision at all!  Need a hotel room in London that has an elevator and Air conditioning for under $250/night in a nice residential area with restaurants but close to a Tube station.