This is a new way of DILD'ing I've thought off.
There are 3 ways to do it:
First way:
When you type "lol" in an instant message program (chat, irc etc.) do a reality check! Either count your fingers, close your one eye to see if your nose is there, or pinch your nose and try to breath through it.
Second way:
Same as before, only that this time you RC when you SEE "lol".
Third way:
http://www.verytasteful.com/downloads/ImTypingLOL.mp3
Listen to it as many times as possible till it gets in your head, every time you listen to it do an RC.
Eventually one of the way's will work.
Now get lol'ing!
PS: For extra awesomeness of the third way, look at the music video http://www.youtube.com/watch?v=up-RX_YN7yA