I'm not too outside but here's what went through my mind, although most wasn't executed well.
1. sub V7 for the I, so while playing g-pent or mixo, throw in some D7 arp lines or D7b9 or whatever
2. Amaj 7 arp (minus root), sounds good to me, kinda like 1/2 outside, maybe you can use this as a bridge between real outside playing and inside.
3. triad thinking, i just put my root along one string and stay diatonic, then throw in the other notes as I slide along. Usually trying to skip strings as much as possible.
I'd like to honestly hear what goes through your mind as you try to make a little outside passage. I think one thing I imagine a lot when trying to go out there, are big intervals, maybe its just me.