If your suddenly finding that Unity will instanty terminate while running your code, check if you are invoking any infinite recusion loops. This has recently happened to me and it was a bit of a pain to track down with Unity 3.5 instantly terminating. Hopfully the Unity team will handle the infinite recustion issue in a future version.

You can visually tag your game objects with icons by selecting the object and clicking the Red/Green/Blue colored cube in the upper left of the inspector window.

You can select a colored Label, Dot, or a Texture from your assets.

I have still been learning the in and outs of Unity for the past few weeks. I've been thinking that because I have not been making any regular posts on this site that I would start posting a series of quick unity tips as I learn of them.

Tip #1 - Prevent config dialog from showing when running your compiled game.

When you build your unity game using "File -> Build & Run" and then run the *.exe that was generated you will see a dialog pop up.

To prevent the configuration window from being shown select "File -> Build Settings..." in unity and click the "Player Settings" button at the bottom of the window. The Unity inspector window will contain a number of options. Find the drop down titled "Display Resolution Dialog" and set it to "Disabled". Rebuild your game and run the generated *.exe. No more dialog pop up!