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Begin with a plan across the year, not a single week of panic. A simple calendar might cover resume writing and projects early, aptitude practice in the middle, and interview practice just before drives begin. Even one hour a week of planned practice does more than a rushed few days.
Use volunteers. Alumni, local professionals, business owners and faculty from other departments can give a talk, run a mock interview or read a stack of resumes. Many are glad to help if asked specifically and for a clear amount of time. 'Could you spend two hours on a Saturday doing mock interviews for ten students?' is easier to say yes to than 'Could you help with placements?'
Try peer practice. Students can run mock interviews and group discussions among themselves, using a short list of questions and a feedback sheet. Seniors who have been placed are especially valuable. Pair them with juniors, and ask them to share what they were asked and how they prepared.
Share resources freely. A folder of sample resumes, previous company test patterns, practice aptitude tests, a list of common interview questions and a list of useful free websites cost almost nothing to put together and help the whole batch. Ask each year's placed students to add what they learned.
Use existing spaces. A seminar room, a classroom or a lab with a few computers can serve as an interview room or practice test centre. A small group meeting in the library on a regular day can be a discussion group.
Keep simple records. A sheet with each student's name, what they need most (aptitude, resume, communication, subject knowledge), what they have done and what is next lets a small team direct effort where it is needed.
Measure small things. How many students completed a mock interview? How many improved on a second aptitude test? How many have a finished resume? These numbers do not need to be impressive. They show what is working so you can do more of it.
Finally, widen the definition of success. Some students will go to higher studies or start businesses, and a good programme supports them too. The aim is that every student leaves with a clear next step.