Thinking about starting your investing journey? Before you jump in, there are a few key things you should consider to give yourself the best possible start and avoid common mistakes. Number one: tax efficiency. One of the first things to think about is tax and how to legally save as much of it as possible. A popular option in the UK is a Stocks and Shares ISA. Any growth or income inside an ISA is free from income tax and capital gains tax, which makes it a powerful long-term investing wrapper.