I am new to LD and i was wondering how often i should set my watch to do a reality check and i was wondering how well this works do you really just preform a reality check in your dream and you realize your in a dream 
and if it works once will you realize your in a LD every time after that, i had an LD on accident and i treid to make a screwdriver appear in my hand it didnt work but now i’m really interested in LD
wow, i just had an LD by reality checking (i havent had an LD in about a month). it didnt last long but at least i could fly… sort of.
anyway welcome to LD4all! its great that you’ve already had an LD. it helps to lift motivation.
to answer your questions:
i hear people set their watches to go off every hour. But what you should do (if you dont already) is also keep a DJ and find dreamsigns to look out for during the day. Things that you see a lot in your dreams. eg. in my dreams im nearly always with my friends so whenever i see them in RL i do RC. But if you dont have a DJ yet then putting an alarm on your watch is a good start 
sometimes people do RC’s because they think of it out of the blue but the idea is that you do them because of something. like my LD this morning, i became lucid because i thought the situation was weird, going to school in the wrong clothes. so did the check and tada. it could fail though so thats why you should always have at least 2 RC’s to go by.
no. well, theres always a chance you’ll lose lucidity after you realize its a dream. but if you mean like the next time you dream after waking up then you’ll have to induce it again
good luck. i hope i answered everything 
thanks for the help i’ll keep trying:) what is a DJ
oh, its a Dream Journal. you can put your mouse over the capitals which are underlined and it’ll tell you what it means 