Some more additions to enhancing your self esteem and confidence:

Scrutiny - before you start, check where your currently at,
Explanation - assess what parts you can take responsibility for and consider open to change,
Love - you may need to challenge your ideas that self love = selfish. Spoil yourself with love both physically and emotionally. Allow yourself to take steps towards your own healing,
Focus - direct your attention to one manageable thing at a time (eg. stop apologising for yourself),
Envisaging - keep reminding yourself of the dream/vision you have for a 'new you' and share this with one person whom you trust,
Strategy - begin a special esteem journal/folder and write down you longer and then shorter term goals. Make sure goals are written specific behaviours, have a timeframe for completion, have specific steps you will take and nominate a reward for your success,
Triggers - breaking any habit is hard work, and self esteem habits have often been in place since childhood, making them quite difficult to change. Identify and name the situations/objects/words/thoughts... etc, that leads to you shrinking and feeling negatively about yourself. Then you can work on specific strategies to address these,
Encouragement - put strong and constructive rewards in place to help you motivate and to recognise your own hard work,
Experimentation - remember that you can be your own best mentor/guide. Feel free to experiment with different strategies that you come up with to enhance your self respect. Think back to a time when your self esteem was high and try to recall what situations etc assisted this. Now be creative in trying to adapt those conditions to fit into your current situation, and
Monitoring - make time to monitor and check your progress. Avoid adopting defensive mechanisms that make you too busy to give time to yourself.