Unity3d utility thing. Right Click an asset-> Copy Asset Path. - ideal for use with AssetDatabase.LoadAssetAtPath<>

CopyAssetPathContextMenu.cs

using UnityEngine;
using UnityEditor;

public static class CopyAssetPathContextMenu
{

    [MenuItem("Assets/Copy Asset Path")]
    public static void CopyAssetPath()
    {
        if (Selection.activeObject != null)
        {
            string assetPath = AssetDatabase.GetAssetPath(Selection.activeObject);
            EditorGUIUtility.systemCopyBuffer = assetPath;
            Debug.Log("Copied to Buffer:" + assetPath);
        }
        else
        {
            Debug.Log("Nothing selected.");
        }

    }
}