Doing this is not going to work for English in a lot of cases. For instance, "Это его шапка." = "This his hat." because "Это" = "this" and "его шапка" = "his hat". But in American English, we do not say this. Instead, we say "This IS his hat." Without the word "is", you will sound like you are a baby and like you are speaking broken English, so it is important to use the correct grammar. :) The only thing I can advise for overcoming this is to practice, practice and practice more and of course consult a grammar book and also don't be afraid to ask a native speaker what to say. :)

Well that's not a good habit in fact every secondary language learner does that mistake.You should avoid it. You should first improve your speaking skill, whatever comes to your mind just through out and try to think in English. when you'll be able to speak fluently with grammar mistakes then start working on your grammar.