Thanks A2A.
As you have not stated what kind of background you have I will assume that it is average. I believe that there are some things that your should know before starting college.
- Know your editor – Know at least one editor. It can be Eclipse and Netbeans. Also know how to run programs with notepad and cmd.
- Know at least one version-control service- I would suggest that you know how Git works. Git is very useful to keep track of your code.
- Browse through Coursera and edX- There are tons of online courses that you can take to complement your studies at college. Just don’t go overboard and drop your CGPA.
- Practise healthy coding habits- Lean to document your code. It will help you in the long run. Also give sensible variable names. Please.