Make sure you have backed up your wallet.dat file. If you have a password on your wallet then backup that data as well.
Step 1: Use a bootstrap file that has the blockchain downloaded till a specific date and replace that data with the one in the appdata/roaming/"btc-wallet" folder. Then you should resume downloading with a real advantage, you might only need to download something like 10% or less.
Another option is to just download Multibit and import your wallet.dat and password data. The blockchain syncing process on Multibit is pretty quick. If you are just sending quick transactions then forgetting about it then that software is pretty good.
If you want to be more secure then use Electrum like the user stated above.
Do not use a bootstrap file, that has been bad advice for nearly two years now. Syncing with bitcoin core is faster. Likewise, pretty much the rest of the message is bad advice too.
Edit:
waveaddict is applying for a sig campaign which generally pays by the post, not matter how accurate or inaccurate they are.