1. Negotiate for your salary. Once got an offer I accepted which turned out to be (at least) 20% below what company was willing to pay me if only I'd asked. 2.

1. Negotiate for your salary. Once got an offer I accepted which turned out to be (at least) 20% below what company was willing to pay me if only I'd asked. 2. Always test your code, and if you're writing in language you're new with get someone else to code review it. Especially if you're bugs are likely to break your company's main customer. 3. Technology is worthless if it doesn't help you achieve your goals. Software is worthless if it doesn't help you achieve your goals. Figure out your goals first. 4. Put another way, ask "why", don't just code. (These are all based on actual mistakes I've made. You can get the full story of these and other mistakes I've made at https://softwareclown.com https://softwareclown.com).