I'm currently working my way towards Destiny as well. Obviously you want keep the TNG books in order and keep the Titan books in order, but I think you can alternate as you please. I'm doing the same thing so that I won't get burnt out on one crew. So far my read list is:
A Time To Kill
A Time To Heal
A Time For War, A Time For Peace
Taking Wing
Articles Of The Federation
Q&A
The Red King
Before Dishonor
Orion's Hounds (upcoming)
Greater Than The Sum (upcoming)
Destiny (upcoming)
As you can see, I'm skipping a few including Death In Winter, Resistance, Sword Of Democles. This is mostly due to reviews and an eagerness to get to Destiny, but I might go back and read them someday.
I enjoyed Articles Of The Federation and highly recommend it. It launches off from Taking Wing a bit, but I would say it's more of a sequel to A Time For War, A Time For Peace. So I would recommend reading that first. My understanding is that a lot of the content in Articles came from War/Peace back when it was originally planned as a duology. A Time For War, A Time For Peace introduces most of the political figures who are later featuresd in Articles.