Reddit mentions of DSTE Replacement for NP-FW50 Battery + DC107 Travel and Car Charger Adapter Compatible Sony Alpha 7 7R 7R II a7S a7R II a5000 a6100 a6300 a6400 a6500 NEX-7 DSC-RX10 II III ILCE-7R 7S QX1 5100 Camera

Free Stuff:

• Use Capture One Express for raw processing; its free.
  
• Use DaVinci Resolve for video editing; its free.
  
• Be able to shoot videos longer than 30 minutes.
  
  Low Cost (Under $30):
  
  
• Have at least one or two spare batteries.
  
• Remote triggers are nice; long range ones are even better.
  
• Mini Tripods are better than no tripod.
  
• Get a hot shoe cover (with a bubble).
  
• Almost always shoot with your lens hood on.
  
• Get the timelapse app.
  
• These flash bounce cards are magic.
  
  Expensive:
  
  
• Shoot RAW and get a big SD card.
  
• The sigma 30mm F/1.4 is almost glued on. I use it a lot.
  
• If looking for a flash checkout Flashpoint and the transmitter (rebranded godox). I have 3 of them.
  
• Flash Bender is a great all around flash modifier; knockoffs work pretty well. If you get a big flash you'll want a modifier.
  
  
  Source: https://www.reddit.com/r/SonyAlpha/comments/4zb5zt/what_are_the_things_i_should_know_read_about_my/