well your good looking so that helps with the perception of the person you are going after...first impression helps.
I like when someone comes up and just says hi and starts chatting with me. Make small chit chat and if they are interested they will keep up the conversation. Also...making an effort with your friends also gives them points
2) In my experience if you are having a good time, texting seems to be step #2 and if they seem to really want to talk and interested in talking..why not set up a date and hang out....the chemistry will do the rest and if there are sparks..you'll know it!
3) I would say the "actions speak louder than words" can help you here. At the end of the day do THEY seem to want to make an effort. Do they want to txt you before bed...when they wake up...these things have given me hints. This guy woke up early JUST to text me good morning after our first date. That got major bonus points
4) hmmm wording is hard. I feel like your trying to hard to make it happen..it should just flow nicely...You don't need to be on a schedule or follow a book of what to do. Just see if they mingle well with you and if you two really seem to get along well. In my experience I use humour..I would say something you want to get out in the open but use humour. Make a joke out of it. For example: if they are looking at you in the eyes...I'd say kidding "I know..you likkkeee me..you wanna kissss me" (from Miss Congeneality) and most times they say...I really do..or laugh and smile and keep looking at you with a grin.
Don't put so much pressure..if it doesn't flow right..it wil
Hope this helped