E.g. Left a message to call or no answer.

I've been in the habit of completing the call task and typing 'LMTC' (Left Message To Call) then setting another task for 2 days' time.

This is good in that it allows me to see the history of call attempts at a glance. But it's bad in that it registers a successful contact. Therefore I can't genuinely see how long it's been since I established direct contact with a lead (something I use the contacts/timeline view for).

What do you do?