If you already have regular one-on-ones with co-workers, now’s a good time to sync up for the last time. Take advantage of these to express your gratitude and thank your co-workers. This is your last opportunity to give feedback, highlight their successes, and share the good times you’ve had together.
One of the things that I appreciate about our design industry is its tight-knit sense of community. Investing in and developing professional relationships, regardless of the company, is key. These people may follow you later. Or you may follow them to another role in a new company. You never know. Companies come and go, but relationships last.
On that last point, make sure to send out an email thanking folks, and leave contact info (usually a personal email) to stay in touch.