You'll also get my bonus FREE music production checklist to help you out even more :)
In this fl studio tutorial I show you how to make a nice arped melody which can be used for melodic songs or anything that fits this style. There really isn't a 'best'' way to make a tune, but hopefully this should give you some ideas. Works in all Fl studio versions including fl studio 12. Actually, this is applicable for any DAW with a piano roll feature.