This might be of help to you if you plan on using Electrum then: https://en.bitcoin.it/wiki/Transferring_coins_from_Bitcoin-Qt_to_Electrum

I haven't used Electrum in some time, I use my own reference implementation of bitcoin to cut down on footprint. QT is excessively bloated and I don't mind working in command line. I use a couple of shell/perl scripts for tasks I perform on a regular basis, i.e. sending coins and signing messages.