Make sure application is 100 percent correct
One of the most important tip in obtaining Tier 4 student visa for UK is to fill up the application form fully correct, there are sometimes when people are unable to answer all the questions in the application form. In that case there are a space in the end of the application form where they allow you to add more information in your own words. Explain why you could not answer the questions and also explain why you cannot provide some documents. It is important for UK immigration to know that you are not hiding any information from them.
Make sure you have more than enough money in your bank account
Having not enough money in your account is basically asking them to refuse your visa, in your account you must have enough money to cover your tuition fees, accommodation and extra money for other spending. For example if your tuition fee is 15000 pound, accommodation is 500 pound per month, make sure you have minimum of 25000 pound which is 15000+(500x12)+4000=25000. It is always best to be safe than sorry, if you don't have enough money to show the immigration then it obvious that you should go somewhere you can afford. If you have sponsor or scholarship then you have to provide the documents. In the UKVI websites you can get the exact minimum amount you have to have in your account.
Make sure your bank account is according to the guidelines of the UK visa immigration (UKVI).
Make sure your bank account is according to the guidelines of the UK visa immigration (UKVI). The account has to be under your name or under your parents name. It has to be available on demand, basically you should be able to draw anytime, so it is always best to show normal savings account, not fixed deposit account or anything like that. It is best if the account is in British pound but if it is in any other currency then your should go to the website provided by the UKVI and covert it and print it and submit it together with your bank details. Sometimes students thinks that it should be fine no worries!! IT IS WRONG, if you think something is wrong then make sure it is fully correct and according to the guidelines. If you country provides different kind of format then you should try a bank that provides the format the UKVI request.
Do not bring you family if you are married
The dependent visa can only be issued to the students that are studying Phd or doctorate, so if you even apply for your family they will reject the visa, because you can only get dependent visa if you are studying postgraduate course lasting more than 12 months, so Masters Degree also does not including because it is 12 months. If you really want to bring your family then you can apply for 6 months tourist visa.
Try to find accommodation before you apply for visa
Having accommodation before apply for visa is also helpful, if you can't find accommodation before you apply for visa then you should explain in your application why you couldn't find accommodation, because in the application there should be a place where you have to provide details of your accommodation in UK so if do not have a place to stay then explain it in the end of the application where they allow you to provide more details or information. Do not write the address of the university if you don't have accommodation in UK and expect it would be ok. It is also highly advisable to stay in the hostel of the university in the beginning and once you find a place then you can move out.
UK visa and immigration are reasonable, they do give visa if all your documents and application is fully correct. They don't know you, so they will only make their best assumption based on the documents and information provided by you when they make decision in your application. They are more than happy to give visa for those who really can afford to study, wants to study, capable of studying without failing, and a good person that has nothing to hide.