I received wonderful help when I asked about "Я собираюсь" - I am going (or planning) to do something.
http://masterrussian.net/mforum/viewtopic.php?t=4734
Now, I have discovered that there is also an expression "Я буду" which may also used in the sense of "I am going to do something"...
How do I distinguish the use of these verbs? It seems that the first version is used more often - or has more universal use.