esnips.com is a site where you can find various kind of material, books, videos etc. You can also find SCJP material over there...check http://www.esnips.com/_t_/scjp

Its very slippery while you invest in stocks. I believe in principle of buying in low price and selling in high price..But there is also another funda to hold on ur investments before selling and wait until you get good margin.
Following article confirms the understanding..

http://www.rediff.com/money/2006/jun/19perfin2.htm

And I think this is true in all sectors..Even in job! Don't get into any job while market is good...:) Wait for good opportunity!

Add http://www.joga.com/Search.aspx?searchFor=V as a portlet in google and enjoy kicks while working!! Probably you get portlet already added on http://www.google.co.in/ig?hl=en