Useful links:
All of these links are just examples for information and services "out there" on the web. There are many, many more, but the ones listed here I tested or used myself.

PSP:
https://www.paypal.com
PayPal is a good Payment Service Provider to start with. It is getting rather big and popular, especially since the company was bought by Ebay. I started with PayPal and am still using it for most of my shops.Plus-Points:- Easy to start- Cheap (not very high fees to receive money from your customers)- Can grow with your businessMinus-Points:- Getting rather big and no room for individual deals- The seller protection program is a farce. If you deal a lot with valuable goods (electronics, jewelry….), then PayPal is not for you

 

Registering a domain:
http://www.directnic.com

This is just one out of a million places to register your domain, but it happens to be the one that I use the most. Reasonable prices and I never had a problem with them. You can also get web space with or without banners there at a good price. This is a pretty good place to start your shop. Once you grow bigger and you have more visitors, you can move to a "real" hosting company.

Professional Web hosting:
http://pair.com
Web hosting company for "phase 2" of your web page. I used these guys since my day one and have never been let down.Excellent service, almost no down time and a flexible pricing/hosting.

Online auction page and sanity-check:
http://www.ebay.com
The classic when it comes to auction houses online. A good place to check, if the goods you offer are really as "hot" as you think they are.

Web Counters:
http://www.nedstatbasic.net
http://extremetracking.com
Again: There are a million other services that offer tracking and counters. Both of the above are free. Nedstat is better when it comes to displaying the hits you get and you can put more than one counter in one account. Extremetracking gives you a better Referrer-Tracking option (i.e. where did the surfers come from?), but you mostly get numbers, not a lot of charts.

Search engine stuff:
http://dmoz.org
This is the "Open Directory Project". A lot of search engines (including Google) get input from this directory. DO take your time when you submit your page. Find the exact right category. DMOZ only asks for a few keywords and short descriptions of your page. Take an hour to think about it and make it a good one. It is worth the investment.

Business / Web Site Logos
http://www.gotlogos.com
One of the many sites offering logos out there on the web. The only difference between this one and other pages: I dealt with this one before and I was content with the result.25$ well invested.

News for your page
http://news.google.com
If you are looking for news that is relevant to your page, a good place to find articles to link to.

Adwords: Quality Ads
https://adwords.google.com
A good place to start for quality Ads: Not the cheapest, but targeted.