I try to be as visible as possible as well. Several methods I have applied so far:
Reflectors:

• 3M 1/4" reflective pin stripes. They come in different colors. I have used them on several bikes. On the BikeE I have used the white ones a long the frame, front fork, handlebar stem and rear chain stay. Red ones on the back at rack and other areas
• An older reflective kids vest. I pulled it over the headrest of the bike.
• Running marathon plus tires which have reflective side walls
• Cheap flag from Wallymart. The whole flag with pole is only about $5. Thinking replacing the flag by a reflective one.
• The panniers also have reflectors on the back

Lights:

• 550 Lumen battery light up front. Flashing during day, solid during night. At night the flashing mode irritates me because it is so bright
• B&M IQ-X dynamo powered light running of a hub dynamo. Since I have been running out of battery lights on longer commutes I added the dynamo set up
• Two flashing battery tail lights. On one the rack and one higher up above the trunk bag
• B&M dynamo powered solid light higher up above the trunk bag

So far it seems to work and I have not been overseen yet.