You might find a site like
Flickr useful. One of the reasons I decided it was worth paying $25 a year for the "Pro" account was because I had been using a free account for a while and it was such a time saver being able to upload my full size images and instantly have different sized versions available that I decided I wanted to keep adding beyond the 200 photo limit (a couple of years later and I'm up to 4000+ images!).
Posting a suitably sized picture here from Flickr is very easy and adds yet more value to having an account there (although there are also other services you may want to consider - I just happen to be a happy customer of that one).
Wulf