I recently had a customer come in and ask about jailbreaking the iPhone and I really didn’t have a site that I could send them to as jailbreaking is quite simple, as long as you do it correctly. I’ve jailbroken hundreds of times and I’ve also run into almost every problem there is. I’ve spent hours searching on how to fix these problems and compiled a list of common problems and the solutions to these. I won’t be releasing this information, it is freely available on the web however there is a lot of misinformation and mistakes out there too.
Then I though I should charge a small fee and do it myself. So I’m now charging a $10 fee to jailbreak an iDevice (which includes fixing any problem that may occur) or $50 to teach someone step by step how to do it themselves because it will take about an hour to do so. This will include common ways to unbrick a device that stops working. Also how to check if you should update to the latest version and when a jailbreak will be available for the latest software update.
As for the customer, he asked about trying out software.
Here’s a tutorial on installing Installous and finding LogMeIn Ignition in it, it’s also a sample of what the tutorial would be like that I would run any customer who would like to partake in the jailbreaking course.
First run Cydia (pronounced /sɪˈdi.ə/). (The red circle with the number 2 in it means I have two updates waiting for me in Cydia).

Once open wait until it finishes it’s updating. It’s common for it to take about a minute.
Then touch Manage.

While in Manage touch Sources.

Once in Sources touch Edit.

Now you’re in Edit mode. Touch Add.

Fill in the Cydia source for Hackulous, which is http://cydia.hackulo.us.

Touch Add Source and wait. A little while later Cydia will stop doing things and let you click on the Hackulous Source. Which will bring you to this screen.

Add AppSync for 4.0+, Hackulous Security, and Installous to your install queue.

Once all are queued, enter the queue and start them downloading.

This will aggregate all the changes, click confirm when you are ready.

Cydia will make the changes and then prompt you to either restart or go back to cydia. If it asks you to restart then do so, if not then press the home button and head back to the springboard (Home screen). If all went well, and it should, now you should have an icon that says Installous. Tap that.

I was asked to help someone try out Logmein Ignition. I Love it and have since bought it.To try it out, open Installous and search for Logmein.

So now touch LogMeIn Ignition and then touch download.

Pick the first download on the list.

Click on Regular if it’s fileape, or if it’s filedude they’ll ask you to solve a captcha. If it’s mediafire, all you have to do is click the download now button. Mediafire sometimes sends you to other pages, if this happens just hit back and try again. Usually the second time works.

Once it’s done downloading, you’re done. It’ll install by itself and you can exit Installous and try out your new program. Please don’t abuse this system by not buying the apps. If you find yourself using them support the developers by buying their programs and leaving feedback on their webpages.
Hope that helps!