Helped in developing troubleshooting skills and analytical analysis.

“Big Box” Internet Service Providers (ISPs) will give you connectivity alone, leaving your residents and staff to handle individual user set-up and troubleshooting.

I opened the outside cover of the heater, and looked through the round window to see if the ignitor was glowing - couldn't see anything that seemed to be glowing.I found this manual that explained operation of the "glow" ignitor, and how to troubleshoot the ignitor under the "BEFORE YOU START" section:http://www.forwardthinking.honeywell.com/related_links/combustion/glowfly/install/69_2334_glowfly_installation.pdfI figured I'd better be certain that the ignitor's glow wasn't being hidden by anything, so I switched off the electricity to the heater and I removed the screws to the burner box taking the cover off too, and then flipped the electric switch back on.

How can i start to trouble shoot this and find the leak around the tank?

Anyway, the books I utilize cover local and state codes, plumbing, carpentry, roofing, electrical trouble-shooting, appliance repair, landscape plants for my area, and so on.

A decent IR temp gun is not very expensive and comes in real handy when troubleshooting hot/cold issues.

If you can't fix it yourself now call in a pro, learn from him as he trouble shoots and goes through the process of fixing this. 

I know when I troubleshoot older homes a lot of the problem is the general circuitry wiring for lighting and receptacles. 

I am trying to trouble shoot why it's not working for me.

Sometimes it’s smarter going to a trusted mechanic (that is a little more expensive) who knows how to troubleshoot and replace one part for less than the cost of a bad mechanic that will try a bunch of different parts.