When the work is done alone at home, the only advice that I can give is to compare what is done with a lot of discs that you are familiar with and that are close to the music on which you work.
Pour le ProTools, la solution la moins coûteuse et qui se rapproche le plus des outils de mastering pro est le plug-in Waves Maximizer. en expérimentant, on trouve assez facilement des réglages d'optimisation de niveau très convaincants.