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1. Want to swim freely between MS office and Latex?

Comments: What I care mostly is how to convert excel table to latex table, so here is how:

export table as .txt file but seperated with "," then find all ',' and replace them by "&"
save as CSV and use csv2latex
use excel2latex addon for Excel --> this is a very handy solution but with unknown bugs, which might hinder your application
open Excel file in some other spreadsheet that has the ability to save as LaTeX file, e.g., Gnumeric (I tried the version for windows and it works like a charm, especially the tabular fragments options)
read the data into R and use the R package "xtable" to get the LaTeX code from a matrix/data.frame

2. Want to convert different picture formats (jpg, pdf, eps...)?

3. Want to draw/generate pictures?

4. Want to use latex file to make Microsoft Powerpoint?

Copy your formula to latexit and generate/output formula in the form of pictures

5. One sentence tips about unix/linux/mac.

To delete the ^M in unix for files from Windows: %s/Ctrl+VCtrl+M//g
To colorize vim: edit or new a .vimrc file at home directory and add "syntax on"
To colorize "ls" result: add "alias ls='ls -h --color=auto' " in .bashrc or .bash_profile; some details
To search a specific file starting from current diretory: find . -name 'file' -print
To optimize "ifort", here is its user manual
To use the profiling function of both intel and gprof: ifort -O -p -g *.f90 | ./a.out | gprof a.out gmon.out; some details
To check cpu and memory info: cat /proc/cpuinfo or cat /proc/meminfo
To debug ifort: idb; To debug gfrotran: gdb; and here is the mannul of idb
To perform memery check in Linux: ps, top, /usr/bin/time -v (unix), pmap, valgrind, and a lots in a file loaded from here.
To perform memery check on Mac OS X with intel chip: /usr/bin/time -lp or use the script to sample "ps" command.
To increase the stack size of your system: ulimit -s unlimited; Note if your code shows "segmentation fault" when you increase the problem size, this might be the solution. I struggled a month to find out this solution.
To run a job in background, add "&" after the command; to prevent its hangup, add "nohup" before the command.
To increase the stack size of MacOS to the limit: ulimit -s 65532
To change file names in batch e.g. *_apbs.pqr to *.pqr: for f in *_apbs.pqr; do mv "$f" "${f/_apbs./.}";done.