Contacts are Everything
The key to breaking into investment banking is a good network of
contacts. You may already be blessed with such a network, but if you
don't have one, you can start to develop one by going on informational
interviews, attending industry conferences, finding alumni from your
school in the business etc. Keep in mind that your network might not
really "pay off" for some time.
Getting Things Done is Important
Starting off in an investment bank, you are usually responsible for
getting projects done well and on-time, whether it be writing reports,
running spreadsheets, trading, doing research or coding programs.
Later, once you get involved with clients and ideas for generating
revenue, you will be rewarded greatly if you can bring in business. At
higher levels (usually Director, Managing Director and up) you are
exposed to much greater risk. At this level, people are often fired for
non-performance, whereas at lower levels you may not be scrutinized as
closely.