Tip 1: Screen
Tip 2: Makefiles and qsub
Tip 3: find
Tip 4: svn conflicts
Tip 5: tee
Tip 6: valgrind
Tip 7: etags
Tip 8: Data Manipulation in Unix
Tip 9: gdb
Tip 10: diff and patch
Tip 11: gprof
Tip 12: Regular Expressions (RegEx)