Sanjeev,
I am sure that Sandeep can do a better job with the technicalities. But, it is rather straightforward, I would think.
Wired vs. Wireless: Wired wins hands down (if your office can accommodate it). More secure, faster, and you won't drop the connection.
Remote access:
RDP/RDC Extremely safe, extremely fast. A little more difficult to set up. Free.
LMI Extremely safe, extremely fast. Have to log into a website unless you pay for LMI ignition. There is a 3rd party, but not a big deal. Rock solid. No real set up issues.
GoToMyPC: Excellent but costs money.
Terminal server: Whole different can of worms. To keep it simple, TS is best when you have a remote office and you want several employees to log in at once
Then, there are the others in the pack: VNC, etc. VPN is NOT a great strategy as data must traverse back and forth across the Internet. A dying technology.
RWW/RWA can only be used with Small Business Servers. VERY secure. Very fast. Again, like LMI, you have to get to the website that is the portal for the server. Gives you TONS of options and makes it easy for staff to log in.
It is easy for staff to log in with LMI as well.
Optimal laptop/desktop: Completely up to the practice. Both have advantages. I think the advantages and disadvantages are obvious.
HTH. Sandeep?