Everything that they posted above me is the easiest way, but it comes with a price.

If you have time, maybe you can check these threads related about merit. Perhaps you can get some.

[Merit] Hey Bitcoiners! Can You Send Encrypted Messages? by OgNasty
[Merit] Hey Newbies! Can You Sign A Message? by OgNasty
[Merit] Help newbies and those who have a little left to the next rank by Ratimov