hey analyze why u r not able to complete ur paper in time.it may be b'coz of many factor's like-
1) ur slow in speed- Only practice can help u overcome this problem.
2) U get stuck on a particular question in exam- Don't ever get stuck on a particular question on more than the time allocated for it. If u get stuck on any ques leave it for the moment proceed wid the next ques and after u complete all ur ques u may always come back to the ques u got stuck in.
3) Wrong choice of ques to answer in the exams- this factor is very imp 4 paper's in which u get a choice on ques to answer and paper like costing which is always very lenghty. Always choose a question which will consume less time to answer rather than a ques which looks much simpler to answer but is very lenghty. For this u need to go through the ques paper thorougly before u start answering any ques so that u may decide which one to answer and which one to not.
4) Choose the section properly which ur most comfortable with- This aspect is also very imp for ex in paper which are split into parts like Costing & FM, answer the part which ur most comfotable with first and then proceed with the other part. The first ques u answer should always be the one ur most comfortable with. Since well begun is half the battle won.
As regards ur writing don't worry abt that my personal experience says that since my writing is also ver y bad u should keep in mind the following points-
a) Try to write ur words big
b) Maintain good enough space between two words
c) Most importantly always highlight the words or underline the words that are most important. U can only use blue pen in the exam as per ICAI rules. so don't worry underline the words with the same pen atleast.
Hope to some extent ur query is solved.
Regards
Prasad.R