Thanks, a lot of good advice!
Yep, I still bank in the US. I get paid in Sterling though, so I only really use my credit card for big purchases to get the ThankYou points. I don't use it for groceries and normal everyday purchases.
I am going to look into the Avios visa as that sounds really nice.
Hotel wise, I like to just stay at a smaller/modern hotel when I am traveling. Not really looking for business hotels that's why I use hotels.com. I will look a bit more into Marriott though. I think the only issue is it winds up being more expensive then what I could get.
Nectar wise, i will look into that on Expedia. I just get them from household spending though so I don't have much. Maybe £150 worth right now.
I am going to look into the Virgin credit card too. I only really use Virgin for TATL because they offer a good service and I can get virgin points pretty easily here. Between Trains, Car Rentals, Tesco purchases they come in pretty easy.
---
Thanks for some of the great advice though. I am going to look into all these and if there is anything else you recommend I'd be glad to hear!