I managed to get a huge lead in this game, but as time went by all my attempted invasions were rebuffed and I had the feeling that I could only wait for my opponent to pass me by and claim my territory. That’s why I resigned. What would be a good strategy in those situations?
Thanks in advance 
just play until the end when there is no way to get even a single point.
Done: http://online-go.com/review/28298
Takeaways: 1) avoid empty triangles and 2) try to estimate the value of your move before you play it (there were many 0-point moves played on both sides).
glad to see that you’re back. i enjoy reading your reviews.