Actually that is the way most people do it, but the "best" (matter of opinion that is based on facts) and most secure way of securing the wire would be the hook and loop splice.
ps: the easiest way to solder, is touch the solder to the tip then put the melted solder on the top of the wire (this heats the wire up instantly to the temp of the melted solder) then move the soldering guns tip to the underneath of the wire and the solder will soak all through the wire and wall-ah you have a perfect solder joint instantly.
The only reason why people say not to touch the solder to the tip is they don't use the soldering guns enough and don't have to replace as often as someone who uses them everyday and/or just don't want to replace the tip or clean it properly. Trust me I have to replace soldering guns too often and old and crusty tips is the least of my worries.
