We create in a vacuum, spending days, months, years even, alone and unsure.
A quick list of things which might be nice to do if you read an indie creators work - please feel free to suggest others;
1. Tell the creator you like their stuff. I try to do this myself. A quick email, a note, a tweet, something, anything to say "I read x, and really enjoyed it". It all helps.
2. Let other people know you liked their stuff. Indie creators rarely have advertising budgets, and for most cannot rival those of the big companies! Try to link to a site where other people can see the work, and let people know. We are in an age of social networking, and this really helps.
3. Check out other stuff by them. Liked book x? Maybe you'll dig book y?
4. Buy something. If you're reading and enjoying a webcomic, why not see if they have a store, and help the creators out a little?
Now, a quick list of things that us creators can do to help build an audience/fan-base (or 'tribe' for you Godinites out there).
1. Respond to any emails you get from people telling you that they like their stuff. Engaging with your audience can be fun, can be rewarding and can turn a casual reader into a long time fan.
2. If you see you're name mentioned on a social network by someone saying they liked your stuff, let them know that you appreciate it. A tweet back to say thanks, for example.
3. Have a store or clear path to a site which houses your work and information about what you are doing now and next. Online stores are incredibly easy to create and maintain, and producing affordable (in both directions) content for them has never been easier (POD, even digital editions).