I kept thinking about my baby the first week I was back to work. I felt guilty to leave him with the babysitter. Therefore, I try to make more quality time with him. The key is I finish work early so I could go home on time to see him. When I get home, I take him out for a walk, play with him, sing to him, read to him. The time is not much, but is definitely high in quality.
When he turns three, I plan to send him to a preshool which has a webcam, you can view your kid via internet. That way I can see him once in a while during the day.