Some keys on my keyboard stopped working? And capslock and backspace?. I have a dell d630 laptop. I fixed it once but forgot how to again. Help.. tired of copy and pasteing

Well it may be due to dust or hard pressing so here the how to fix them. Hope this ll help if not then let me know what you getting problem after that.
Laptop Repair Help A key fell off the laptop keyboard. Fixing the problem. (http://www.laptoprepair101.com/laptop/2007/03/20/key-fell-off-keyboard/)

I suggest you to buy a new one, it much cheaper than repair it. I've just bought one from http://www.feevoo.com ,only $18