-Try different nic levels till you find the right spot. For me, 18mg or 1.8% is great. I can vape all day long, not get sick, and get the nic that I need. For those times when its like, UMMMM... GIVE ME A CIG, having some stronger juice on hand, in a flavor you ADORE, isnt a bad idea.
-Juices. Try tons. Personally, Im not really interested in Tobacco vapes. I never smoked cigs for the flavor. I was a Menthol guy, I truly hated non menthol cigs. Thats not to say I didnt enjoy the occasional cigar, or the even rarer pipe, but those tobaccos are entirely different from cig tobacco. Dont try and find a juice that your old cigs tasted like, unless they were menthol. Its probably not going to happen. You might find a menthol which is close to what you smoked though. Me, I like flavors. Fruits, Desserts, Sweet/Nutty etc etc. Once I found some flavors I really enjoyed, is when cigs kinda just left my mind. My very first experiences with ecigs was with menthol flavors, and it just didnt do it for me. Flavors, LOTS of different flavors, is what really helped me not be interested in cigs.
-Get some different types of delivery devices for the Ego. Try some Kanger Evods, Vivi Novas, Strait up Cartomizers, Cartomizer Tanks, etc etc. The EgoC system isn't wonderful, but its workable. Bgut the battery itself is solid. Screw on an Evod or better yet, a Low Resistance Cartomizer, and you'll be in business.
Boge Low Resistance Cartos-http://www.myvaporstore.com/510_Boge_Cartomizer_5_Pack_p/510bgct.htm
iClear 16 Clearomizers-http://www.myvaporstore.com/Innokin_iClear_16_Dual_Coil_Ego_Clearomizer_p/ink-ic16.htm
Kanger Pro Tank-http://www.myvaporstore.com/Kanger_Protank_p/krpt-k.htm
All nice choices. Lots of other stuff too. If the option exists, choose low resistance. It will give the best vape on the Ego Battery.
As for Juices, there is a ton of high quality, USA made juices out there. Check out TasteYourJuice.com, for not only a whole plethora of juice reviews, but also a whole crapton of information for the new vaper.
Im going to suggest you go check out MountBakerVapor. They have a massive selection of juices, which you can completely tailor to your desires(change the pg/vg ratio and choose the nic levels, even add extra flavor shots), and they are, by a large margin, incredibly cheap for what you get. When it comes to liking juices, everyone has thier own likes/dislikes, but with the huge variety MBV has to offer, you shouljd certainly be able to find what you like. Ive tried a whole ton of their juices, and only flat out didnt like one of them. I like some a lot more then others, but everything except one, was tasty and worthy of having in the collection.