1) Always decide a realistic budget in mind before planning the trip.
2) Make notes of each and every expense you make, when I say each and every expense I mean it,for eg- From begger ko 2rs diye se lekar 5rs ka station par water fill karvaya
3) Always use public transport, trains and public buses (no rickshaw and taxi, unless no other option is there)
4) 3-4 kms distance should be covered with the help of walking ( you will become Fit,save money,free sight seeing)
5) Never hesitate from asking for general favours like Lift,sharing cabs etc
6) Do not book your hotel stay in advance, research it online and book it in person, you will be able to negotiate it which is not possible in online booking
7) Plan your stays in Hostels or dormitories,this will help you to make new friends and connection, this can also be beneficial for the trip.
8) When you are traveling solo,make sure one of your friend/ family member should know wherever you are, this is for safety reasons
9) Don't be suspicious always,this doesn't mean be careless, if you are being too suspicious the solo Travelling thrill will be gone
10) Only book your Major travel,for eg Mumbai to Dehradun, the intercity travel should be booked in person,this will give you more options