Hello Ram,
Have a look on the blog by Juan Reyes where you can find nice suggestion on BASIS front:
https://scn.sap.com/community/netweaver-administrator/blog/2010/05/11/back-to-basis
Check below link for routine tasks, though it requires adding few more i.e : SM66/SM50, AL08/SM04,ST03/ST03n,ST06n,ST04/DB02, SM12 (explore on your own about all these transaction code,this will help you to know more about these) :
http://wiki.sdn.sap.com/wiki/pages/viewpage.action?pageId=311330914&bc=true
and yes of course you need to go though TADM books (TADM10,TADM12 and TADM5X depending on DB you are interested).
All the best,
SUJIT