Hi,

I understand that you want to learn 8051 programming techniques. This site(8052.com) is an excellent resource to start with. While starting first of all note all the theoritical concepts related to 8051; such as pin diagram, different SFR's it has, instruction sets, addressing modes,interrupts, configuring serial port etc. Later start with working on small programs like manipulating addresses, working with registers, memory allocation, arithematic calculations etc. Firmly understand the operation of 8bit and 16 bit registers. U can then pass on to next module like building projects based on Assembly language. Keil is best software to build 8051 projects. You can start a small project like glowing LED's when some event occurs later building up complex projects.

I do hope that the above information is helpful to you.

Thank you.